第三章3.3請將下面各數用八進制數和十六進制數表示：(1)10 (2)32 (3)75 (4)-617(5)-111(6)2483(7)-28654(8)21003解：十八十六(10)=(12)=(a)(32)=(40)=20(75)=(113)=4b(-617)=(176627)=fd97-Hl=177621=ff912483=4663=963-28654=110022=901221003=51013=520b3.5字符常量與字符串常量有什么區別？解：字符常量是一個字符，用單引號括起來。字符串常量是由0個或若干個字符而成，用雙引號把它們括起來，存儲時自動在字符串最后加一個結束符號3.6寫出以下程序的運行結果：#includevoidmain()(charcl='",c2=b',c3='c',c4=70r,c5=716';printf(na%cb%c\tc%c\tabc\nH,cl,c2,c3);printf(M\t\b%c%c\n",c4,c5);解:程序的運行結果為：aabbccabcAN將”China”譯成密碼.密碼規律:用原來的字母后面第4個字母代替原來的字母，例如,字母“A”后面第4個字母是“E",用”E“代替”A”.因此“China”應譯為“Glmre”.請編一程序，用賦初值的議程使cl,c2,c3,c4,c5分別變成并輸出.main(){charcl=nCn,c2=,,hn,c3=,,i,,,c4='n,,c5=,a,;cl+=4;c2+=4;c3+=4;c4+=4;c5+=4;prinlf("密碼是％c%c%c%c%c\n”,cl,c2,c3,c4,c5);)例3.6能否改成如下：#includevoidmain()intcl,c2;（原為charcl,c2）cl=97;c2=98;printf(',%c%c\nM,cl,c2);printf(M%d%d\n",cl,c2);}解:可以.因為在可輸出的字符范圍內,用整型和字符型作用相同.求下面算術表達式的值.(l)x+a%3*(int)(x+y)%2/4=2.5(x=2.5,a=7,y=4.7)(2)(float)(a+b)/2+(int)x%(int)y=3.5(設a=2,b=3,x=3.5,y=2.5)寫出下面程序的運行結果：#includevoidmain()(inti,j,m,n;i=8;j=10；m=++i;n=j++；printf("%d,%d,%d,%d\n",i,j,m,n);I解:結果:9,11,9,10第4章.a=3,b=4,c=5,x=1.2,y=2.4,z=-3.6,u=51274,n=128765,c1=宜,c2=b.想得到以下的輸出格式和結果,請寫出程序要求輸出的結果如下：a=3b=4c=5x=i.200000,y=2.400000,z=-3.600000x+y=3.60y+z=-1.20z+x=-2.40u=51274n=128765cl='a'or97(ASCII)c2=B'or98(ASCII)解：main()(inta,b,c;longintu,n;floatx,y,z;charcl,c2;a=3;b=4;c=5;x=l.2;y=2.4;z=-3.6;u=51274;n=128765;cl='a';c2='b';printf("\n")；printf("a=%2db=%2dc=%2d\nu,a,b,c);printf(Mx=%8.6f,y=%8.6f,z=%9.6f\n*\x,y,z);printf(Mx+y=%5.2fy=z=%5.2fz+x=%5.2f\n”,x+y,y+z,z+x);printf(nu=%61dn=%91d\nn,u,n);printf("cl='%c'or%d(ASCII)\nu,cl,c2);printf(',c2=,%c,or%d(ASCII)\n,',c2,c2);1請寫出下面程序的輸出結果.結果：575767.856400,-789.12396267.856400,-789.12396267,86,-789.12,67.856400,-789.123962,67.856400.-789.1239626.785640e+001,-7.89e+002A,65,101,411234567,4553207,d68765535,17777,fiffifrlCOMPUTER,COM用下面的scanf函數輸入數據，使a=3,b=7,x=8.5,y=7L82,cl=A,c2=，a；間在鍵盤上如何輸入？main()(inta,b;floatx,y;charcl,c2;scanf("a=%db=%d,&a,&b);scanf(Mx=%fy=%eH,&x,&y);scanf(ncl=%cc2=%cn,&c1,&c2);)解:可按如下方式在鍵盤上輸入：a=3b=7x=8.5y=71.82c1=Ac2=a說明:在邊疆使用I一個或多個scnaf函數時，第一個輸入行末尾輸入的“回車"被第二個scanf函數吸收，因此在第二E個scanf函數的雙引號后設一個空格以抵消上行入的"回車".如果沒有這個空格，按上面輸入數據會出錯，讀者目前對此只留有一初步概念即可，以后再進一步深入理解.用下面的scanf函數輸入數據使a=10,b=20,c1='A',c2='a',x=1.5,y=-3.75,z=57.8,請問在鍵盤上如何輸入數據？scanf("%5d%5d%c%c%f%>f%*f%f",&a,&b,&cl,&c2,&y,&z);解：main()inta,b;floatx,y,z;charcl,c2;scanf(H%5d%5d%c%c%f%f;&a,&b,&cl,&c2,&x,&y,&z);}運行時輸入：10 20Aal.5-3.75+1.5,67.8注解：按％5d格式的要求輸入a與b時，要先鍵入三個空格，而后再打入10與20。％*f是用來禁止賦值的。在輸入時，對應于％*f的地方，隨意打入了一個數1.5,該值不會賦給任何變量。設圓半徑=1.5,圓柱高h=3,求圓周長,圓面枳，圓球表面積，圓球體積，圓柱體積，用scanf輸入數據,輸出計算結果，輸出時要求有文字說明,取小數點后兩位數字.請編程.解:main。(floatpi,h,r,l,s,sq,vq,vz;pi=3.1415926;printf("請輸入圓半徑r圓柱高h:\n");scanf("%f,%f,,&r,&h);l=2*pi*r;s=r*r*pi;sq=4*pi*r*r;vq=4.0/3.0*pi*r*r*r;vz=pi*r*r*h;printf("圓周長為： =%6.2f\n",l);printf("圓面積為： =%6.2f\n",s);printf("圓球表面積為：=%6.2f\n",sq);printf("圓球體積為： =%6.2f\n",vz);)輸入一個華氏溫度，要求輸出攝氏溫度，公式為C=5/9(F-32),輸出要有文字說明，取兩位小數.解：main()(floatc,f;printf("請輸入一個華氏溫度scanf("%F,&f)；c=(5.0/9.0)*(f-32);printf("攝氏溫度為:%5.2f\n",c);第五章邏輯運算和判斷選取結構有三個整數a,b,c,由鍵盤輸入,輸出其中最大的數.main()(inta,b,c;printf("請輸入三個數:")；scanf(M%d,%d,%d';&a,&b,&c);if(aif(bprintf("max=%d\nn,c);elseprintf("max=%d\nn,b);elseif(aprintf(Mmax=%d\nM,c);elseprintf("max-%d\nf\a);)方法2:使用條件表達式.main(){inta,b,c,tennp,max;printf("請輸入A,B,C:”)；scanf("%d,%d,%du,&a,&b,&c);printf("A=%d,B=%d,C=%d\n:a,b,c);temp=(a>b)?a:b;max=(temp>c)?temp:c;printf(" A,B,C中最大數是％dJ,max);}main(){intx,y;printf("輸入x:");scanf(,,%d,\&x);if(x<l){y=x;pnntf(HX-%d,Y=X=%d\n*x,y);)elseif(x<10){y=2*x-l;printf(nX=%d,Y=2*X-l=%d\n",x,y);}else{y=3*x-l1;printf(MX=5d,Y=3*x-ll=%d\n'\x,y);（習題5-6:）自己寫的已經運行成功！不同的人有不同的算法,這些答案僅供參考!818#includevoidmain()(floats,i;chara;scanf(H%f;&s);while(s>100lls<0)(printf("輸入錯誤!error!”)；scanf(u%r,&s);)i=s/10;switch((int)i)(case10:case9:a='A';break;case8:a=B';break;case7:a=C';break;case6:a=,D,;break;case5:case4:case2:case0:a='E';)printf(M%c",a);}http://818/給一個不多于5位的正整數，要求：1.求它是幾位數2.分別打印出每一位數字3.按逆序打印出各位數字.例如原數為321,應輸出123.main()(longintnum;intindiv,ten,hundred,housand,tenthousand,place;prinlf("請輸入一個整數(0-99999):")；scanf("%ld",&num);if(num>9999)place=5;elseif(num>999)place=4;elseif(num>99)place=3;elseif(num>9)place=2;elseplace=l;printf("place=%d\n",place);printf("每位數字為ten_thousand=num/10000;thousand=(num-tenthousand*10000)/1000;hundred=(num-tenthousand*10000-thousand*1000)/100;ten=(num-tenthousand*10000-thousand*1000-hundred*100)/10;indiv=num-tenthousand*10000-thousand*1000-hundred*100-ten*l0;switch(place){case5:printf("%d,%d,%d,%d,%d",tenthousand,thousand,hundred,ten,indiv);printf("\n反序數字為:")；printf(',%d%d%d%d%d\n,,,indiv,ten,hundred,thousand,tenthousand);break;case4:printf(,,%d,%d,%d,%d,\thousand,hundred,ten,indiv);printf(M\n反序數字為:")；printf(',%d%d%d%d\n'\indiv,ten,hundred,thousand);break;case3:printf(',%d,%d,%d\n",hundred,ten,indiv);printf(n\n反序數字為:")；printf(1,%d%d%d\n,\indiv,ten,hundred);case2:printf(H%d,%d\n",ten,indiv);printf(M\n反序數字為:")；printf(n%d%d\n'\indiv,ten);casel:printf("%d\n'\indiv);printf("\n反序數字為:")；printf("%d\n",indiv);l.if語句main(){longi;floatbonus,bon1,bon2,bon4,bon6,bon10;bonl=100000*0.1;bon2=bon1+100000*0.075;bon4=bon2+200000*0.05;bon6=bon4+200000*0.03;bon10=bon6+400000*0.015;scanf(M%ldM,&i);if(i<=1e5)bonus=i*0.1;elseif(i<=2e5)bonus=bonl+(i-l00000)*04075;elseif(i<=4e5)bonus=bon2+(i-200000)*0.05;elseif(i<=6e5)bonus=bon4+(i-400000)*0.03;elseif(i<=1e6)bonus=bon64-(i-600000)*0.015;elsebonus=bon10+(i-l000000)*0.01;printf("bonus=%10.2f\bonus);)用switch語句編程序main()(longi;floatbonus,bon1,bon2,bon4,bon6,bon10;intbranch;bonl=100000*0.1;bon2=bon1+100000*0.075;bon4=bon2+200000*0.05;bon6=bon4+200000*0.03;bon10=bon6+400000*0.015;scanf(M%ldn,&i);branch=i/l00000;if(branch>10)branch=10;switch(branch){case0:bonus=i*0.1;break;case1:bonus=bunl+(i-100000)*0.075;break;case3:bonus=bon2+(i-200000)*0.05;break;case4:case5:bonus=bon4+(i-400000)*0.03;break;case9:bonus=bon6+(i-600000)*0.015;break;case10:bonus=bon10+(i-1000000)*0.01;)printf(nbonus=%10.2f\bonus);}http://818/輸入四個整數，按大小順序輸出.main(){intt?a,b,c,d;printf("請輸入四個數門；scanf(M%d,%d,%d,%dn,&a,&b,&c,&d);printfC'NnXna=%d,b=%d,c=%d,d=%d\n';a,b,c,d);if(a>b){t=a;a=b;b=t;}if(a>c){t=a;a=c;c=t;}if(a>d){t=a;a=d;d=t;}if(b>c){t=b;b=c;c=t;}if(b>d){t=b;b=d;d=t;)if(c>d){t=c;c=d;d=t;}printf("\n排序結果如下:\n");printf("%d%d%d%d\n",a,b,c,d);)塔main()(inth=10;floatx,y,x0=2,y0=2,d1,d2,d3,d4;printf("請輸入一個點(x,y):")；scanf(H%f,%r,&x,&y);d1=(x-x0)*(x-x0)+(y-y0)(y-y0);d2=(x-x0)*(x-x0)+(y+y0)(y+y0);d3=(x+x0)*(x+x0)+(y-y0)*(y-y0);d4=(x+x0)*(x+x0)+(y+y0)*(y+y0);if(dl>l&&d2>l&&d3>l&&d4>l)h=0;printf("該點高度為％。》));http://818/第六章循環語句輸入兩個正數，求最大公約數最小公倍數.main()(inta,b,num1,num2,temp;primf("請輸入兩個正整數:\n");scanf(,,%d,%d,',&numl,&num2);if(numl{temp=numl;numl=num2;num2=temp;)a=numl,b=num2;while(b!=O)(temp=a%b;a=b;b=temp;)primf("它們的最大公約數為:％d\n”,a);printf("它們的最小公倍數為:％d\n”,numl*num2/2);)輸入一行字符，分別統計出其中英文字母，空格，數字和其它字符的個數.解：#include< >main()(charc;intIetters=0,space=0,degit=0,other=0;printf("請輸入一行字符An");scanf("%c",&c);while((c=getchar())!=*\n,)(if(c>=,a'&&c<=,z,llc>,A,&&c<=,Z,)letters++;elseif(c==*)space++;elseif(c>='0'&&c<=,9,)digit++;elseother++;}printf("其中:字母數=%d空格數=%d數字數=%d其它字符數二%d\n",letters,space,digit,other);)求s(n)=a+aa+aaa+???+aa???a之值,其中工是一個數字.解：main()inta,n,count=1,sn=O,tn=O;printf("請輸入a和n的值:\n");scanf(M%d,%dM,&a,&n);printf("a=%dn=%d\n",a,n);while(count<=n)(tn=tn+a;sn=sn+tn;a=a*10;++count;)printf(na+aa+aaa4-...=%d\n",sn);)求l+2!+3!+4!+…+20!.main()(floatn,s=0,t=l;for(n=l;nv=20;n++)(t=t*n;s=s+t;)printf("1!+2!+...+20!=%e\n",s);)main()(intNl=l00,N2=50,N3=10;floatk;floats1=0,s2=0,s3=0;for(k=l;kv=Nl;k++)/*計算1到100的和*/(sl=sl+k;}for(k=l;kv=N2;k++)/*計算1到50各數平方和N(s2=s2+k*k;}for(k=l;k<=N3;k++)(s3=s3+l/k;printf(“總和=%8.2朋”,§1+§2+§3);水仙開花main()inti,j,k,n;printf("'水仙花'數是:")；for(n=100;n<1000;n++)(i=n/100;j=n/10-i*10;k=n%10;if(i*100+j*10+k=i*i*i+j*j*j+k*k*k)(printf(,,%d,\n);)}printf(H\nn);}完數main()includeM1000/*定義尋找范圍*/main()(intk0,kl,k2,k3,k4,k5,k6,k7,k8,k9;inti,j,n,s;for(j=2;j<=M;j++)(n=0;s=j；for(i=l;i{if((j%i)==0)(if((j%i)==0)(n++;s=s-i;switch(n)/*將每個因子賦給k0,kl-k9*/(k0=i;break;kl=i;break;k2=i;break;k3=i;break;k4=i;break;k5=i;break;k6=i;break;k7=i;break;k8=i;break;k9=i;break;if(s==O)printf("％d是一個‘完數’，它的因子是”,j)；if(n>l)printf("％d,%d”,kO,kl);if(n>2)printf(,,,%d,',k2);if(n>3)printf(",％d",k3);if(n>4)printf(M,%dM,k4);if(n>5)printf(,,,%d,,,k5);if(n>6)printf(',,%d,',k6);if(n>7)printf(",％d",k7);if(n>8)printf(",％d",k8);if(n>9)printf(",％d",k9);printf(M\nM);})方法二:此題用數組方法更為簡單.main()(staticintk[10];inti,j,n,s;for(j=2;j<=1000;j++){n=-l;s=j；for(i=l;i{if((j%i)==O)(n++;s=s-i;k[n]=i;/*將每個因子賦給k0,kl...k9*/}}if(s==O){printf(M%d是一個完數,它的因子是：j);for(i=0;iprintf(H%d,H,k[i]);printf(M%d\nH,k[n]);有一個分數序列21,3/2,5/3,8/5……求出這個數列的前20項之和.解:main()(intn,t,number=20;floata=2,b=l,s=0;for(n=1;n<=number;n++)(s=s+a/b;t=a,a=a+b,b=t;}printf(“總和=%9.6朋”聲);球反彈問題main()floatsn=100.0,hn=sn/2;intn;for(n=2;n<=10;n++)(sn=sn+2*hn;/*第n次落地時共經過的米數*/hn=hn/2;/*第n次反跳高度*/)printf("第10次落地時共經過%1*米\nH,sn);printf("第10次反彈％￡米.5”由11);)猴子吃桃main(){intday,xl,x2;day=9;x2=l;while(day>0)(xl=(x2+l)*2;x2=xl;day-;)printf(“桃子總^=%d\nH,x1);6.12#include"math.h,,main(){floatx,x0,f,f1;x=1.5;do{x0=x;f=((2*x0-4)*x0+3)*x0-6;fl=(6*x0-8)*x0+3;x=x0-f/fl;}while(fabs(x-xO)>=1e-5);printf(',x=%6.2f\n',,x);#include"math.h,,main(){floatxO,x1,x2,fx0,fxl,fx2;do{scanf(n%f,%f',&xl,&x2);fxl=xl*((2*xl-4)*xl+3)-6;fx2=x2*((2*x2-4)*x2+3)-6;)while(fx1*fx2>0);do{x0=(xl+x2)/2;fxO=xO*((2*xO-4)*xO+3)-6;if((fx0*fxl)<0){x2=x0;fx2=fx0;}else{xl=xO;fxl=fxO;while(fabs(fx0)>=le-5);printf(MxO=%6.2f\n'\xO);http://818/6.14打印圖案main(){inti,j,k;for(i=0;i<=3;i++){for(j=0;j<=2-i;j++)printf(HM);for(k=0;k<=2*i;k++)printf(M*M);printfC^*');)for(i=0;i<=2;i++){for(j=0;j<=i;j++)printfC");for(k=0;k<=4-2*i;k++)printf(M*n);prinlf("\n")；htlp://818/6.15乒乓比賽main(){chari,j,k;/*i是a是對手j是b是對手;k是c的對手*/fbr(i=,x,;i<=,z';i++)for(j='x,;j<='z';j++)(if(i!=j)for(k=,x,;k<=,z,;k++)(if(i!=k&&j!=k){if(i!=x'&&k!='x'&&k!='z')printf("順序為:\na?％c\tb??％c\tc??％c\n”,i,j,k);用篩選法求100之內的素數./*用篩選法求100之內的素數#include#defineN101main(){inti,j,line,a[N];for(i=2;ifor(i=2;ifor(j=i+1;j{if(a[ij!=0&&a[j]!=0)if(aU]%a[i]=0)a(jJ=0；printf(H\nH);for(i=2,line=0;i{if(a[i]!=0){printf(”％5d”,a[i]);line++;if(line==10){printf(u\nn);line=0;}用選擇法對10個數排序./*選擇法排序.*/#defineN10main(){inti,j,min,temp,a[N];/*輸入數據*/printf(”請輸入十個數:\n“)；for(i=0;i{printf("a[%d]=H,i);scanf(M%dn,&a[i]);}printf(M\nn);for(i=0;iprintf(H%5dH,a[i]);printf(M\nM);/*排序*/for(i=0;i{min=i;for(j=i+l;jif(a[min]>a[j])min=j;temp=a[i];a[i]=a[min];a[min]=temp;)/*輸出*/printf("\n排序結果如下An");for(i=0;iprintf("%5d",a[i]);http://818/對角線和：/*計算矩陣對角線元素之和*/main()(floata[3][3],sum=O;inti,j;printf("請輸入矩陣元素:\n");for(i=0;i<3;i++)for(j=0;j<3;j++)scanf(n%r,&a[i][j]);for(i=0;i<3;i++)sum=sum+a[i][i];printf("對角元素之和=6.2F,sum);)插入數據到數組/*插入數據到數組*/main(){inta[ll]={1,4,6,9,13,16,19,28,40,100};inttemp1,temp2,number,end,i,j;printf("初始數組如下for(i=0;i<10;i++)printf("％5d”,a[i]);printf(M\nM);printf("輸入插入數據scanf(,'%d",&number);end=a[9];if(number>end)a[10]=number;else{for(i=0;i<10;i++){if(a[i]>number){templ=a[i];a[i]=number;fbr(j=i+1;j<11y++){temp2=a[j];a[j]=templ;templ=temp2;}break;for(i=Ou<ll;i++)printf("a%6d',,a[i]);)將一個數組逆序存放。/*數組逆序存放*/#defineN5main(){inta[N]={8,6,5,4J},i,temp;printf(M\n初始數組:\n")；for(i=0;iprintf(',%4d,',a[i]);for(i=0;i{temp=a[i];a[i]=a[N-i-l];a[N-i-l]=temp;)printfC'\n交換后的數組:\n”);for(i=0;iprintf("%4d",a[i]);}楊輝三角/*打印楊輝三角形*/#defineN11main(){inti,j,a[N][N];for(i=l;i(a[i][i]=l;a[i][l]=l；)for(i=3;i for(j=2;j<=i-1;j++)a[i]U]=a[i01]U-l]+a[i-l]U];for(i=l;i {for(j=1;j<=i；j++)printf("％6d”,a[i][j];printf(M\nM);)printf(n\nu);)7.8鞍點/*查找鞍點*/#defineN10#defineM10main(){inti,j,k,m,n,flagl,ilag2,a[N][M],max,maxi,maxj;printfCAn輸入行數n:M);scanf(n%dH,&n);printf("\n輸入列數m:M);scanf(”％d”,&m);for(i=0;i{printf("第%d行?for(j=0;jscanf("％d”,&a[i][j];)for(i=0;i{for(j=0;jprintf(“％5d”閔pritf(M\nM);}flag2=0;for(i=0;i{max=a[i][0];for(j=0;jif(a[i][j]>max){max=a[i]|j];maxj=j;)for(k=0,flagl=l;kif(max>a[k][max])flag1=0;if(flagl){printf("\n第％d行，第％d歹I」的％d是鞍點\n",i,maxj,max);flag2=l;if(!flag2)printf("\n矩陣中無鞍點！\n");http://818/7.9變量說明:top,bolt:查找區間兩端點的下標;loca:查找成功與否的開關變量./*折半查找*/#include#defineN15main(){intij,number,top,bott,min,loca,a[N],flag;charc;for(i=0;i<=N;i++)scanf(”％d”,&a[i]);flag=l;while(flag){scanf(”％d”,&number);loca=0;top=0;bott=N-l;if((numbera[N-l]))loca=-l;while((loca=0)&&(top<=bott)){min=(bott+top)/2;if(number==a[min]){loca=min;printf("number=%d,loca=%d\nH,number,loca+1);)elseif(number bott=min-l;elsetop=min+l;)if(loca==Ollloca==-1)printf("%dnotintable\n",number);printf("continueY/Nory/n\n");c=getchar();if(c==,N,llc==n,)flag=O;)http://818/7.10/*統計字符數*/main(){inti,j,uppn,lown,dign,span,othn;chartext[3][8O];uppn=lown=dign=span=othn=0;for(i=0;i<3;i++){printf(H\n請輸入第％(1行:gets(text[i]);for(j=0;j<80&&text[i][j]!=\0';j++){if(text[i][j]>='A,&&text[i][j]<='Z,)uppn+=l;elseif(text[i][j]>=,a,&&text[i][j]<='z,)lown+=1;elseif(text[i][j]>=,r&&text[i][j]<='9')dign+=l;elseif(text[i][j]=*1)span+=1;elseothn+=l;)}for(i=0;i<3;i++)printf("％s=n",text「]);printf("大寫字母數:％d\n",uppn);printf("小寫字母數:％d\iT,lown);printf("數字個數:％d\n”,dign);printf("空格個數:％d\n",span);printf("其它字符:％d\n”,othn);/*打印圖案*/main(){staticchara[5]={'**',*,'**'};inti,j,k;charspace、'；for(i=0;i<=5;i++){printf(n\nn);for(j=l;j<=3*i;j++)printf(,,%lc'\space);for(k=0;k<=5;k++)printf(M%3cM,a[k];http://818//*譯電文*/#includemain(){inti,n;charch[80],tran[80];printf("請輸入字符gets(ch);printf(M\n密碼是％c”,ch);i=0;whileCchli]!^){if((ch[i]>=,A,)&&(ch[i]<='Z'))tran[i]=26+64-ch[i]+1+64;elseif((ch[i]>='a,)&&(ch[i]<='z'))tran[i]=26+96-ch[i]+l+96;elsetran[i]=ch[i];i++；}n=i;printf("\n原文是:")；for(i=0;iputchar(tran(i]);/*連接兩個字符串(不用'stracf)*/main(){charsl[80],s2[40];inti=0,j=0;prinlf("\n請輸入字符串1:M);scanf(n%sH,sl);printf("\n請輸入字符串2:")；scanf(,'%s,\s2);while(sl[i]!=W)i++;while(s2[j]!=,\0')sl[i++]=s2|j++];printf(H\n連接后字符串為:%s*sl)；/*字符串比較*/#includemain(){inti,resu;charsl[100],s2[100];printf("請輸入字符串l:\iT);gets(sl);printf(H\n請輸入字符串2:\n")；gets(s2);i=0;while((sl[i]==s2[i])&&(sl[i]!=V)'))i++;if(sl[iJ==,\O'&&s2[i]==\0')resu=0;elseresu=sl[i]-s2[ij;printf(M%s與％$比較結果是％d”,sl,s2,resu);}http://818//*字符串復制*/#includemain()(charfrom[80],to[80];inti;printf("請輸入字符串)scanf(,,%s,',from);for(i=0;i<=strlen(from);i++)to[i]=from[i];printf("復制字符串為:％s\n”,to);)第八章函數8.1(最小公倍數=11*丫/最大公約數.)hcf(u,v)intu,v;(inta,b,t,r;if(u>v){t=u;u=v;v=t;}a=u;b=v;while((r=b%a)!=O){b=a;a=r;}retum(a);)lcd(u,v,h)intu,v,h;{intu,v,h,l;scanf(M%d,%dn,&u,&v);h=hcf(u,v);printf(HH.C.F=%d\nM,h);l=lcd(u,v,h);printf(nL.C.d=%d\nM);){retum(u*v/h);)main(){intu,v,h,l;scanf(M%d,%dn,&u,&v);h=hcf(u,v);printf(MH.C.F=%d\nn,h);l=lcd(u,v,h);printf(ML.C.D=%d\nMJ)；)求方程根#include<math.h>floatxl,x2,disc,p,q;greater_than_zero(a,b)floata,b;{xl=(-b+sqrt(disc))/(2*a);x2=(-b-sqrt(disc))/(2*a);)equal_to_zero(a,b)floata,b;{x1=x2=-b/(2*a);}smaller_than_zero(a,b)floata,b;{p=-b/(2*a);q=sqrt(-disc)/(2*a);}main(){floata,b,c;scanf(H%f,%f,%r,&a,&b,&c);disc=b*b-4*a*c;if(fabs(disc)<=le-5){equal_to_zero(a,b);printf(Mx1=%5.2f\tx2=%5.2f\n",x1,x2);)elseif(disc>0){greater_than_zero(a,b);printf(Hx1=%5.2f\tx2=%5.2f\nu,xl,x2);}else{smaller_than_zero(a,b);printf(Hxl=%5.2f+%5.2fi\tx2=%5.2f-%5.2fi\nH,p,q,p,q);素數/*判斷整數是否為素數*/#include<stdio.h>main(){intnumber;scanf(n%dn,&number);if(prime(number))printf(nyesH);elseprintf("no");}intprime(number)intnumber;{intilag=l,n;for(n=2;n<number/2&&flag==1;n++)if(number%n==O)flag=O;retum(flag);/*矩陣的轉置*/#defineN3intarray[N][N];convert(array)intarray[3][3];{intij,t;for(i=0;i<N;i++)for(j=i+l;j<N;j++){t=array[i][j];array[ij[j]=array[j]li]；array[j][i]=t;)}main(){inti,j;for(i=0;i<N;i++)for(j=0;j<N;j++)scanf(,'%d,,,&array[i][j]);convert(array);for(i=0;i<N;i++){printf(',\nn);for(j=0;j<N;j++)printf(,,%5d,',array[i][j]);/*字符串反序存放*/main()(charstr[100];printf("輸入字符串An");scanf(,,%s,,,str);inverse(str);printf("轉換后的字符串是:%s\n\str);}inverse(str)charstr[];(chart;inti,j;for(i=0,j=strlen(str);i{t=str[i];str[i]=str[i-l];str[i-l]=t;)/*字符串聯接*/charconcatenate(stringl,string2,string);charstring1[],string2[],string[J;(inti,j;for(i=0;string1[i]!=10';i++)stringli]=stringl[i];for(j=0;string2[j]!=、0';j++)string[i+j]=string2|j];string[i+j]=W;)main()(charsl[100],s2[100],s[100];printf("\n輸入字符串1：\n");scanf(n%sn,sl);prinlff輸入字符串2:\n")；scanf(n%sn,s2);concatenate(s1,s2,s);printf("連接后的字符串:%s\nM,s);/*在四個數字符中加空格*/main()(charstr[80];printf(”請輸入含有四個數字的字符串:\nM);scanf(M%sM,str);insert(str);}insert(str)charstr[];(inti;for(i=strlen(str);i>0;i-){str[2*i]=str[i];strl2*i-lj=*1printf(H\n結果是:\n %s'\str);)/*統計字母數字空格和其它字符數*/#includeMmath.hnintalph,digit,space,others;main(){chartext[80];gets(text);alph=0,digit=0,space=0,others=0;count(text);printf(H\nalph=%d,digit=%d,space=%d,others=%d\iiM,alph,digit,space,others);)count(str)charstr[];{inti;for(i=0;str[i]!='0';i++)if((str[i]>=,a'&&str[i]<=,z,)ll(str[i]>=,A,&&str[i]<='Z,))alph++;elseif(str[i]>=,0'&&str[i]<='9')digit++;elseif(strcmp(str[i]；*)==0)space++;elseothers++;/*輸出文本行的最長單詞*/intalphabetic(c);charc;(if((c>='a,&&c<=,z,ll(c>=,A,&&cv='Z'))return(1);elsereturn(O);}/*尋找最長的詞*/intlongest(string)charstring[];(intlen=0,iJength=0,flag=1,place,point;for(i=0;i<=strlen(string);i++)if(alphabctic(string[i]))if(flag)point=i;flag=O;)elselen++;else{Aag=l;iflen>length){length=len;place=point;len=O;}}retum(place);)main()(inti;charline[100];printf("輸入一行文本\n”);gets(line);printf("\n最長的單詞是:")；for(i=longest(line);alphabctic(line[i]);i++)printf(',%c,',line[i];printf('^\n^^);/*起泡法排序*/#include#defineN10charstr[N];main()for(flag=1;flag==1;)(printf(”\n輸入字符串,長度為10:\nM);scanf(”％s”,&slr);if(strlen(str)>N)printf("超過長度，請重輸!，elseflag=O;}sort(str);printf(H\n排序結果:")；for(i=0;iprimf("％c”,slr[i]);}sort(str)charstr[N];(inti,j;chart;for(j=l；jfor(i=0;(iif(str[i]>str[i+1]){t=str[i];str[i]=str[i+l];str[i+l]=t;)}8.12#include#includefloatsolut(a,b,c,d)floata,b,c,d；{floatx=l,xO,f,fl;do{xO=x;f=((a*xO+b)*xO+c)*xO+d;fl=(3*a*x0+2*b)*x0+c;x=xO-f/fl;}while(fabs(x-xO)>=le-5);return(x);)main(){floata,b,c,d;scanf("％f,%f,%f,%f”,&a,&b,&c,&d);printf(',x=%10,7f\n,,,solut(a,b,c,d))；)8.13#includemain(){intx,n;floatp();scanf(,,%d,%d,',&n,&x);printf('rP%d(%d)=%10.2f\n'\n,x,p(n,x));)floatp(tn,tx)inttn,tx;{if(tn==0)retum(l);elseif(tn==l)retum(tx);elseretum(((2*tn-1)*tx*p((tn-1),tx)-(tn-1)*p((tn-2),tx))/tn);)8.14#include"stdio.h"#defineN10#defineM5floatscorelNJ[MJ;floata_stu[Nl,a_cor[Ml；main(){intij,r,c;floath;floats_diff();floathighest();uO;c=l;input_stu();avr_stu();avr_cor();printfCAnnumberclass12345avrH);for(i=0;i{printf(,,\nNO%2d'\i+l);for(j=0;jprintf(l,%8.2f,,score[i](jj);printf("%8,2fM,a_stu[i]);

printf("\nclassavru);for(j=0;jprintfC^S2f\a.corlj]);h=highest(&r,&c);printf(M\n\n%8.2f%d%d\nH,h,r,c);printf("\n%8.2f\n",s_diff());)input_stu(){inti,j;floatx;for(i=0;i{for(j=0;j{scanf(n%f;&x);score[i][j]=x;avr_stu(){inti,j;floats;for(i=0;i{for(j=0,s=0;ja_stu[i]=s/5.0;avr_stu(){inti,j;floats;for(i=0;i{for(j=0,s=0;ja_stu[i]=s/5.0;))avr_cor(){inti,j;floats;for(j=0;j{for(i=0,s=0;ia_cor|j]=s/(float)N;}}floathighest(r,c)int*r,*c;{floathigh;inti,j;high=score[0][0];for(i=0;ifor(j=0;j{high=score[i][j];*r=i+l;*c=j+l;)retum(high);}floats_diff(){inti,j;s+=score[i][j];s+=score[i][j];if(score[i][jj>high)floatsumx=0.0,sumxn=0.0;floatsumx=0.0,sumxn=0.0;for(i=0;i{sumx+=a_stu[ij*a_stu[i];sumxn+=a_stu[i];)return(sumx/N-(sumxn/N)*(sumxn/N));)8.15#include#defineN10voidinput_e(num,name)intnum[];charname[N][8];{inti;for(i=0;i{scanf("％d”,&num[i]);gets(name[i]);)}voidsort(num,name)intnum[];charname[N][8];{intij,min,tempi;chartemp2[8];for(i=0;i{min=i;for(j=i;jif(num[min]>num|j])min=j;templ=num[i];num[i]=num[min];num[min]=templ;strcpy(temp2,name[i]);strcpy(name[i],name[min]);strcpy(name[min],temp2);}for(i=0;iprintf(u\n%5d%10sn,num[i],name[i]);}voidsearch(n,num,name)intn,num[];charname[N][8];{inttop,bott,min,loca;loca=0;top=0;bott=N-l;if((nnum[N-l]))loca=-l;while((loca==0)&&(top<=bott)){min=(bott+top)/2;if(n==num[min]){loca=min;printf(',number=%d,name=%s\n",n,name[loca]);)elseif(nbott=min-l;elsetop=min+l;)if(loca==Ollloca==-1)printf("number=%disnotintable\n'\n);)main(){intnum[N],number,flag,c,n;charname[N][8];input_e(num,name);sort(num,name);for(flag=l;flag;){scanf(H%d'\&number);search(number,num,name);printf(,,continue?Y/N!M);c=getchar();if(c==,N,llc==,n,)flag=0;/*十六進制轉換為十進制*/#include#defineMAX1000main(){intc,i,flag,flag1;chart[MAX];i=0;flag=0;flag1=1;printf(H\n輸入十六進制數:")；while((c=getchar())!=AO'&&i{ifc>='0'&&c<=,9'llc>='a,&&c<='fllc>='A,&&c<='F'){flag=l;t[i++]=c;t[i]='\O';printf("\n十進制數%d\n",htoi(t));printf("繼續嗎?")；c=getchar();if(c==N,llc==,n')flag1=0;else{flag=0;i=0;printfCAn輸入卜六進制數htoi(s)chars[];{inti,n;n=0;for(i=0;s[i]!=l\0t;i++){if(s[i]>=,0,&&s[i]<=,9,)n=n*16+s[i]-'O';if(s[i]>='a,&&s[i]<=T)n=n*164-s[i]-'a'4-l0;if(s[i]>='A,&&s[i]<=F)n=n*16+s[i],A'+10;)retum(n);/*遞歸法將整數轉換成字符*/#includevoidcounvert(n)intn;{inti;if((i=n/10);=0)convert(i);putchar(n%10+'0);main(){intnumber;printf(n\n輸入整數scanf(M%dn,&number);printf(M\n輸出是：")；if(number<0){putchar(,-1);number=-number;)convert(number);/*計算某晶為該年的第幾天*/main()(intyear,month,day;intdays;printf(M\n請輸入日期(年，月，日)\n”)；scanf("%d,%d,%d,',&year,&month,&day);printf(n\n%d年％<1月％<1H",year,month,day);days=sum_day(month,day);if(leap(year)&&month>=3)days=days+1;printf("是該年的％d天.\n”,days);)staticintday_tab[l3]={0,31,28,31,30,31,30,31,31,30,31,30,31}int(sum_day(month,day)intmonth,day;|inti;for(i=l;i day+=day_tab[i];retum(day);intleap(year)intyear;intleap;leap=year%4==0&&year%100!=0llyear%400==0;retum(leap);第九章編譯預處理/*交換兩變量值*/#defineSWAP(a,b)t=b;b=a;a=tmain()printff請輸入兩個整數a,b:H);scanf(M%d,%d\&a,&b);SWAP(a,b);printf("交換結果為:a=%d,b=%d\n”,a,b);/*求兩個整數相除的余數*/#defineSURPLUS(a,b)((a)%(b))main()(inta,b;printf("請輸入兩個整數a,b:H);scanf("%d,%d,',&a,&b);printf(Ha,b相除的余數為:%d\n”,SURPLUS⑶b));)/*輸入三角形的三條邊，求其面積*/#include#definS(a,b,c)((a+b+c)/2)#defineAREA(a,b,c)(sqrt(S(a,b,c)*(S(a,b,c)-a)*(S(a,b,c)-b)*(s(a,b,c)-C)))main()(floata,b,c;printf("請輸入三角形的三條邊:")；scanf(n%f,%f,%f\&a,&b,&c);if(a+b>c&&a+c>b&&b+c>a)printf("其面積為:％8.2f.\n\AREA(a,b,c));elseprimf("不能構成三角形!)/*判斷輸入年份是否為閏年*/#defineLEAP_YEAR(y)(y%4==0)&&(y%100!=0)ll(y%400==0)main()(intyear;printf(M\n請輸入某一年:")；scanf(H%dM,&year);if(LEAP_YEAR(year))printf(n%d是閏年An”,year);elseprintf("%d不是閏年An",year);解:展開后：printf("&#l18alue=%format\t'*,x);printf(n&#l18alue=%format\t,\x);putchar('\n');printf(H&#l18alue=%format\t',);printf(,,&#l18alue=%format\t",x2);putchar(\n,);輸出結果：value=5.000000ormatvalue=5.000000ormatvalue=3.0000(K)ormatvalue=8.000000ormat9.8/*用函數方法,從三個數中找出最大值*/main()(inta,b,c;printf(”請輸入三個整數/);scanf("%d,%d,%d';&a,&b,&c);printf("三個之中最大值為:％d\n”,max(a,b,c));)max(x,y,z)intx,y,z;(intt;t=(x>y?x:y);retum(t>z?t:z);9.10/*翻譯電碼*/#include#defineMAX80#defineCHANGE1main()(charstr[MAX];inti;printf("請輸入文本行An”)；scanf(n%sM,str);#if(CHANGE)(for(i=0;i{if(str[i]!='\01&&str[i]v'z'IIstr[i]>='A'&&str[i]<,Z,)str[i]+=l;elseif(str[i]=='z'IIstr[i]=='Z,)str[i]-=25;#endifprintf("輸出電碼為:\n%s",str);)第十章指針10.1main(){intnl,n2,n3;int*pl,*p2,*p3;scanf(H%d,%d,%d';&nI,&n2,&n3);pl=&nl;p2=&n2;p3=&n3;if(nl>n2)swap(p1,p2);if(n1>n3)swap(pl,p3);if(n2>n3)swap(p2,p3);printf("％d,%d,%d\n”,nI,n2,n3);)swap(pl,p2)int*pl,*p2;{intp;p=*pl;*pl=*p2;*p2=p;)10.2main(){char*str1[20],*str2[20],*str3[20];charswap();scanf("%s”,strl);scanf(n%sH,str2);scanf(n%sM,str3);if(strcmp(str1,str2)>0)swap(str1,str2);if(strcmp(str1,str3)>0)swap(str1,str3);if(strcmp(str2,str3)>0)swap(str2,str3);printf(H%s\n%s\n%s\n",strl,str2,str3);}charswap(pl,p2)char*pl,*p2;{char*p[20];strcpy(p,pl);strcpy(pl,p2);strcpy(p2,p);10.3main(){intnumber[10];input(number);max_min_&#l18alue(number);output(number);}input(number)intnumber[10];{inti;for(i=0;i<10;i++)scanned1',&number[i]);}max_min_&#l18alue(number)intnumber[10];{int*max,*min;int*p,*end;end=number+10;max=min=number;for(p=number+l;pif(*p>*max)max=p;elseif(*p<*min)min=p;*p=number[0];number[0]=*min;*min=*p;*p=number[9];number[9]=*max;*max=*p;return;}output(number)intnumber[10];{int*p;for(p=number;pprintf("%d,",*p);printf(M%d\nM,*p);)10.4main(){intnumber[20],n,m,i;scanf("％d”,&n);scanf(H%d",&m);for(i=0;iscanf(M%dM,&number[i]);move(number,n,m);for(i=0;iprintf(H%8dM,number[i]);)move(array,n,m)intarray[20],n,m;(int*p,end;end=*(array+n-l);for(p=aiTay+n-l;p>array;p-)*array=end;m-;if(m>0)move(array,n,m);)10.5#defmenmax50main(){inii,k,m,n,num[nmax],*p;scanf("％d，&n);p=num;for(i=0;i*(p+i)=i+1;i=k=m=0;while(m{if(*(p+i)!=0)k++;if(k==3){*(p+i)=O;k=0;m++;)i++；if(i==n)i=0;)while(*p=0)p++;printf("％d”/p);)10.6main(){intlen;char*str[20];scanf("％s”,str);len=length(str);printf(',\nlen=%d\n°Jen);)length(p)char*p;{intn=0;while(*p!=\O,){n++;p++;}return(n);)10.7main(){intm;char*strl[20],*str2[20];scanf(n%s'\strl);scanf("％d”,&m);if(strlen(strl)printf(HeirorM);else{copystr(str1,str2,m);printf("％s”,str2);)}copystr(pl,p2,m)char*pl,*p2;intm;{intn=0;while(n{n++;pl++;)while(*pl!=W){*p2=*pl;pl++；p2++;}*p2=A0,;}10.8#include"stdio.hnmain(){intcle=0,sle=0,di=0,wsp=0,ot=0,i;char*p,s[20];for(i=0;i<20;i++)s[i]=0;i=0;while((s[i]=getchar())!=*\n')i++;p=s；while(*p!='\n'){if(*p>=*a,&&*p<='z')++sle;elseif(*p>=,A,&&*p<='Z,)+4-cle;elseif(*p==*')++wsp;elseif(*p>='0'&&*p<=,9')++di;else++ot;P++；)printf(Msle=%d,cle=%d,wsp=%d,di=%d,ot=%d\nM,sle,cle,wsp,di,ot);)10.9main(){inta[3][3],*pj;for(i=0;i<3;i++)scanf(M%d,%d,%dM,a[i][0],a[i][l],a[i][2]);p=a;move(p);for(i=0;i<3;i++)printf(M%d%d%d\n'\a[i][0],a[i][1],a[i][2]);)move(pointer)int*pointer;{intij,t；for(i=0;i<2;i++)for(j=i+l；j<3;j++){t=*(pointer+3*i+j);*(pointer+3*i+j)=*(pointer+3*j+i);*(pointer+3*j+i)=t;10.10main(){inta[5][5],*p,i,j;for(i=0;i<5;i++)for(j=0;j<5;j++)scanf(,'%d,,,&a[ij(j])；P=a；change(p);for(i=0;i<5;i++){printf(n\nn);for(j=0;j<5;j++)printf(M%8d\a[i][j]);change(p)int*p;{inti,j,change;int*pmax,*pmin;pmax=p;pmin=p;for(i=0;i<5;i++)for(j=0;j<5;j++){if(*pmax<*(p+5*i+j))pmax=p+5*i+j;if(*pmin>*(p+5*i4j))pmin=p+5*i+j;)change=*(p+12);*(p+12)=*pmax;*pmax=change;change=*p;*p=*pmin;*pmin=change;pmin=p+l;for(i=0;i<5;i++)for(j=0;j<5;j++)if(((p+5*i+j)!=p)&&(*pmin>*(p+5*i-fj)))pmin=p+5*i+j;change=*(p+4);*(p+4)=*pmin;*pmin=change;pmin=p+l;for(i=0;i<5;i++)for(j=0;j<5;j++)if(((p+5*i+j)!=(p+4))&&((p+5*i+j)!=p)&&(*pmin>*(p+5*i+j)))pmin=p+5*i+j;change=*(p+20);*(p+20)=*pmin;*pmin=change;pmin=p+l;for(i=0;i<5;i++)for(j=0;j<5;j++)if(((p+5*i+j)!=p)&&((p+5*i+j)!=(p+4))&&((p+5*i+j)!=(p+20))&&(*pmin>*(p+5*i+j)))pmin=p4-5*i+j;change=*(p+24);*(p+24)=*pmin;*pmin=change;10.11main()(inti;char*p,str[10][10];for(i=0;i<10;i++)scanf(n%sn,str[i]);p=str;sort(p);f