C语言程序设计(第三版)课后习题答案.doc

C程序设计（第三版）答案-谭浩强程序是在VC6.0下编译的，所以头文件和TC的不太一样！4-8#include #define pi 3.1415void main()float r,h,rl,ra,ss,sv,cv;printf(输入圆的半径和圆柱的高nn);scanf(%f%f,&r,&h);rl=2*pi*r;ra=pi*r*r;ss=4*pi*r*r;sv=4*pi*r*r*r/3;cv=ra*h;printf(圆周长为：%fnn圆面积为：%fnn圆球表面积为：%fnn圆球体积为：%fnn圆柱体积为：%fnn,rl,ra,ss,sv,cv);4-9#include void main()float F,c;printf(输入一个华氏温度nn);scanf(%f,&F);c=5*(F-32)/9;printf(摄氏温度为：%.2fnn,c);第五章5-4#include void main()int a,b,c,max;printf(输入三个整数a,b,cnn);scanf(%d%d%d,&a,&b,&c);if(ab) max=a;else max=b;if(maxc) max=c;printf(最大的数为：%dnn,max);5-5#include void main()float x,y;printf(输入xnn);scanf(%f,&x);if(x1) y=x;else if(x10) y=2*x-1; else y=3*x-11; printf(y=%fnn,y);5-6#include void main()float m;int n;printf(输入成绩nn);scanf(%f,&m);n=m/10;switch(n)case 0:case 1: case 2:case 3: case 4:case 5:printf(Enn);break;case 6:printf(Dnn);break;case 7:printf(Cnn);break;case 8:printf(Bnn);break;case 9:case 10:printf(Ann);break;5-7#include #include void main()int a,b,c,i,j,n;printf(输入五位正整数nn);scanf(%d,&a);printf(nn);c=a; for(i=1;i+)b=c%10;c=c/10;printf(%d,b);if(c=0)printf(nn);printf(正整数为%d位数nn,i);break;c=a;for(j=i-1;j=0;j-)n=pow(10,j);b=c/n;c=c%n;printf(%dn,b);5-8if语句：#include void main()int I;float bonus;printf(输入当月利润Inn);scanf(%d,&I);if(I=100000) bonus=I/10;else if(I=200000) bonus=10000+(I-100000)*7.5/100; else if(I=400000) bonus=10000+7500+(I-200000)*5/100; else if(I=600000) bonus=10000+7500+10000+(I-400000)*3/100; else if(I=1000000) bonus=10000+7500+10000+6000+(I-600000)*1.5/100; else bonus=10000+7500+10000+6000+6000+(I-1000000)*1/100;printf(应发奖金数为：%fnn,bonus);switch语句：#include void main()int I,n;float bonus;printf(输入当月利润Inn);scanf(%d,&I);if(I1000000) n=10;else n=I/100000;switch(n)case 0:bonus=I/10;break;case 1:bonus=10000+(I-100000)*7.5/100;break;case 2: case 3:bonus=10000+7500+(I-200000)*5/100;break;case 4:case 5:bonus=10000+7500+10000+(I-400000)*3/100;break;case 6:case 7:case 8:case 9:bonus=10000+7500+10000+6000+(I-600000)*1.5/100;break;case 10:bonus=10000+7500+10000+6000+6000+(I-1000000)*1/100;break;printf(应发奖金数为：%fnn,bonus);5-9#include void main()int a,b,c,d,temp,min;printf(输入四个数a,b,c,dnn);scanf(%d%d%d%d,&a,&b,&c,&d);if(ab)temp=a;a=b;b=temp;if(ac)temp=a;a=c;c=temp;if(ad)temp=a;a=d;d=temp;printf(由小到大排列为：nn);printf(%d ,a);if(bc)temp=b;b=c;c=temp;if(bd)temp=b;b=d;d=temp;printf(%d ,b);if(cd)temp=c;c=d;d=temp;printf(%d ,c);printf(%d,d);5-10#include #include void main()float x,y,a,b,c,d;printf(输入点的坐标nn);scanf(%f%f,&x,&y);a=sqrt(2-x)*(2-x)+(2-y)*(2-y);b=sqrt(2-x)*(2-x)+(-2-y)*(-2-y);c=sqrt(-2-x)*(-2-x)+(-2-y)*(-2-y);d=sqrt(-2-x)*(-2-x)+(2-y)*(2-y);if(a=1|b=1|c=1|d=1) printf(该点建筑高度为：10m);else printf(该点建筑高度为：0m);第六章：6-1#include #include void main()int m,n,max,min,i,k;printf(输入两个正整数nn);scanf(%d%d,&m,&n);if(mn) k=n;else k=m;for(i=1;in) k=m;else k=n;for(i=k;i+)if(i%m=0)&(i%n=0)min=i;break;printf(最小公倍数为：%dnn,min);6-2#include void main()char c;int l=0,b=0,n=0,e=0;printf(输入一行字符nn);while(c=getchar()!=n)if(c=a&c=A&c=48&c=57) n+=1; else e+=1;printf(英文字母个数为：%dnn空格个数为：%dnn数字个数为：%dnn其他字符个数为：%dnn,l,b,n,e);6-3#include #include void main()int n,k,i;float a,s=0;printf(输入n和ann);scanf(%d%f,&n,&a);for(i=0;in;i+)k=pow(10,i);s=s+(n-i)*a*k;printf(和s=%fnn,s);6-4#include void main()int n,s,S=0,i,j;printf(输入nnn);scanf(%d,&n);for(i=1;j=n;i+)s=1;for(j=1;j=i;j+)s=s*j;S+=s;printf(和S=%dnn,S);6-5#include void main()int i,m,n,t;int s1=0,s2=0;float s3=0,s,l;printf(输入m,n,t的值nn);scanf(%d%d%d,&m,&n,&t);for(i=1;i=m;i+)s1+=i;for(i=1;i=n;i+)s2+=i*i;for(i=1;i=t;i+)l=1.0/i;s3+=l;s=s1+s2+s3;printf(和s=%f,s);6-6#include void main()int m,n,k,i,j;printf(水仙花数为：n);for(i=100;i=999;i+)j=i;m=j%10;j=j/10;n=j%10;k=j/10;if(i=m*m*m+n*n*n+k*k*k) printf(%d ,i);6-7#include #include void main()int i,j,k,s;for(i=1;i=1000;i+)s=0;for(j=1;ji;j+)if(i%j=0) s+=j;if(s=i)printf(nn);printf(%d its factors are ,i);for(j=1;ji;j+)if(i%j=0) printf(%d ,j);6-8#include void main()int n,i;float f1,f2,s,temp;printf(输入nnn);scanf(%d,&n);f1=2.0;f2=3.0;s=f1;for(i=1;i=n-1;i+)s+=f2/f1;temp=f2;f2=f1+f2;f1=temp;printf(前%d项和为%f,n,s);6-9#include #include void main()int i,n,l=100;float m,s=0;printf(输入nnn);scanf(%d,&n);m=l;for(i=1;i=n;i+)s+=2*m;m=m*0.5;printf(第%d次落地时经过%f米nn,n,s-l);printf(第%d次落地后反弹%f米nn,n,m);6-10#include void main()int m=1,n,i;printf(输入nnn);scanf(%d,&n);for(i=1;in;i+)m=(m+1)*2;printf(一共摘了%d个桃子nn,m);6-11#include #include void main()float a,x1,x2;printf(输入ann);scanf(%f,&a);x1=a/2;loop:x2=(x1+a/x1)/2;if(fabs(x1-x2)1e-5)x1=x2;goto loop;else printf(nna的平方根为%fnn,x2);6-12#include #include void main()float f(float); float xpoint(float,float); float root(float,float);float x,x1,x2,f1,f2;doprintf(输入x1,x2nn);scanf(%f%f,&x1,&x2);f1=f(x1);f2=f(x2);while(f1*f20);x=root(x1,x2);printf(方程在1.5附近的根为：%fnn,x);float f(float x)float y;y=2*x*x*x-4*x*x+3*x-6;return(y);float xpoint(float x1,float x2)float y;y=(x1*f(x2)-x2*f(x1)/(f(x2)-f(x1);return(y);float root(float x1,float x2)float x,y,y1;y1=f(x1);dox=xpoint(x1,x2);y=f(x);if(y*y10)y1=y;x1=x;elsex2=x;while(fabs(y)1e-4);return(x);6-13#include #include void main()float f(float);float root(float,float);float x,x1,x2,f1,f2;doprintf(输入x1,x2nn);scanf(%f%f,&x1,&x2);f1=f(x1);f2=f(x2);while(f1*f20);x=root(x1,x2);printf(方程的根为：%fnn,x);float f(float x)float y;y=2*x*x*x-4*x*x+3*x-6;return(y);float root(float x1,float x2)float x,y;doy=f(x1+x2)/2);if(y1e-4)x2=(x1+x2)/2;else x=(x1+x2)/2;while(fabs(y)1e-4);return(x);6-14#include void main() int i,j,k; for(i=0;i=3;i+) for(j=0;j=2-i;j+) printf( ); for(k=0;k=2*i;k+) printf(*); printf(n); for(i=0;i=2;i+) for(j=0;j=i;j+)printf( ); for(k=0;k=4-2*i;k+)printf(*); printf(n); 6-15#include void main()char i,j,k;for(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(nA-%cnB-%cnC-%cn,i,j,k);第七章7-1#include #include void main()int i,j;int a101;printf(素数为：nn);for(i=1;i=100;i+)ai=i;for(i=3;i=100;i+)for(j=2;j=sqrt(ai);j+)if(ai%j=0)ai=0;break;for(i=2;i=100;i+)if(ai!=0) printf(%d ,ai);7-2#include void main()int a10,i,j,temp;printf(输入10个整数nn);for(i=0;i10;i+)scanf(%d,&ai);for(i=0;i10;i+)for(j=i+1;jaj)temp=ai;ai=aj;aj=temp;printf(排序后的输出为：nn);for(i=0;i10;i+)printf(%d ,ai);printf(nn);7-3#include void main()int a9,i,s=0;printf(输入一个3*3整型矩阵nn);for(i=0;i9;i+)scanf(%d,&ai);for(i=0;i9;i+=4)s+=ai;printf(对角线元素之和为：%dnn,s);7-4#include void main()int a11=1,2,3,4,5,6,7,8,9,10;int i,j,n,temp1,temp2;printf(输入一个数nnn);scanf(%d,&n); if(a0-a9)0)if(n=a9)a10=n;elsefor(i=0;i10;i+)if(ain)temp1=ai;ai=n;for(j=i+1;j0)if(n=a9)a10=n;elsefor(i=0;in)temp1=ai;ai=n;for(j=i+1;j11;j+)temp2=aj;aj=temp1;temp1=temp2;break;for(i=0;i11;i+)printf(%d ,ai);7-5#include #define N 5void main()int aN;int i,temp;printf(输入5个个数nn);for(i=0;iN;i+)scanf(%d,&ai);for(i=0;i=N/2;i+)temp=ai;ai=aN-i-1;aN-i-1=temp;for(i=0;iN;i+)printf(%d ,ai);printf(nn);7-6#include #include void main()int a1010=1;int i,j;for(i=1;i10;i+)for(j=0;j=i;j+)ai0=ai-10;aij=ai-1j-1+ai-1j;for(i=0;i10;i+)for(j=0;j=i;j+)printf(%4d,aij);printf(nn);7-7#include #define N 7void main()int aNN=0;int i,j,k;i=0;j=(N-1)/2;aij=1;for(k=2;k=N*N;k+)i=i-1;j=j+1;if(iN-1)i=i+2;j=j-1;elseif(iN-1) j=0;if(aij=0)aij=k;elsei=i+2;j=j-1;aij=k;for(i=0;iN;i+)for(j=0;jN;j+)printf(%4d,aij);printf(nn);7-8#include void main()int a44,i,j,max,min,k1,k2,flag;printf(输入一个4*4的数组nn);for(i=0;i4;i+)for(j=0;j4;j+)scanf(%d,&aij);printf(鞍点为：nn);for(i=0;i4;i+)max=ai0;for(j=0;j4;j+)if(max=aij)max=aij;k1=j;min=a0k1;for(j=0;j=ajk1)min=ajk1;k2=j;if(max!=min) flag=0;elseflag=1;printf(%dn,max);break;if(flag=0) printf(不存在nn);7-9#include void main()float a15=100,98,65,55,34,23,23,12,11,9,7,6,4,3,2,n;int i,low,high,mid;printf(原数组为：nn);for(i=0;i15;i+)printf(%6.2f,ai);printf(nn输入一个数nnn);scanf(%f,&n);low=0;high=14;i=0;while(low=high)mid=(low+high)/2;if(amid=n)printf(该数是数组中第%d个元素nn,mid+1);i+;break;else if(amidn) high=mid-1;else low=mid+1;if(i=0) printf(无此数!nn);7-10#include void main()char a380;int i,j,upon=0,low=0,num=0,spa=0,oth=0;for(i=0;i3;i+)printf(输入第%d行文字nn,i);gets(ai);for(j=0;j=A&aij=a&aij=48&aij=57) num+=1;else if(aij= ) spa+=1;else oth+=1;printf(英文大写字母：%d个nn,upon);printf(英文小写字母：%d个nn,low);printf(数字： %d个nn,num);printf(空格： %d个nn,spa);printf(其他字符： %d个nn,oth);7-11#include void main()int i,j;for(i=0;i5;i+)for(j=0;j=i;j+)printf( );for(j=i;ji+5;j+)printf(* );printf(n);7-12#include void main()char a80,b80;int i,j;printf(输入密码nn);gets(a);for(i=0;i=A)&(ai=a)&(ai=z)bi=219-ai;else bi=ai;bi=0;printf(密文为：nn);puts(a);printf(原文为：nn);puts(b);7-13#include void main()char a80,b80;int i,j,k;printf(输入第1个字符串nn);gets(a);printf(输入第2个字符串nn);gets(b);for(i=0;i80;i+)if(ai=0)k=i;for(j=0;j80&bj!=0;j+)ak=bj;k+;ak=0;break;printf(连接后字符串为：nn);puts(a);7-14#include void main()char a80,b80;int i,j,k;printf(输入第1个字符串nn);gets(a);printf(输入第2个字符串nn);gets(b);for(i=0;(i0)printf(nn字符串a大于字符串b：%4dnn,k);break;else if(k0)printf(nn字符串a小于字符串b：%4dnn,k);break;else k=0;if(k=0) printf(nn字符串a等于字符串b：%4dnn,k);7-15#include void main()char s180,s280;int i,j;printf(输入数组s1nn);gets(s1);printf(输入数组s2nn);gets(s2);for(i=0;i80&s2i!=0;i+)s1i=s2i;s1i=0;printf(nn复制后的数组为：nn);puts(s1);第八章8-1#include void main()int max_div(int,int);int min_mul(int,int);int m,n;printf(输入两个整数nn);scanf(%d%d,&m,&n);if(max_div(m,n)=0) printf(nn无最大公约数为nn);else printf(nn最大公倍数为：%dnn,max_div(m,n);printf(nn最大公倍数为：%dnn,min_mul(m,n);int max_div(int k1,int k2)int min(int,int);int i,k,flag;k=min(k1,k2);for(i=k;i1;i-)if(k1%i=0)&(k2%i=0)return(i);flag=1;break;else flag=0;if(flag=0) return(0);int min_mul(int k1,int k2)int max(int,int);int i,k;k=max(k1,k2);for(i=k;i+)if(i%k1=0)&(i%k2=0)return(i);break;int min(int k1,int k2)int min;min=k1;if(k1k2) min=k2;return(min);int max(int k1,int k2)int max;max=k1;if(k1k2) max=k2;return(max);8-2#include #include void main()void root1(float,float,float);void root2(float,float,float);void root3(float,float,float);float a,b,c,k;printf(输入a,b,c的值nn);scanf(%f%f%f,&a,&b,&c);k=b*b-4*a*c;if(k0) root1(a,b,c);else if(k=0) root2(a,b,c);else root3(a,b,c);void root1(float a,float b,float c)float p,q;p=-b/(2*a);q=sqrt(b*b-4*a*c)/(2*a);printf(nn方程的两个根为：x1=%6.2f,x2=%6.2fnn,p+q,p-q);void root2(float a,float b,float c)float p;p=-b/(2*a);printf(nn方程的两个根为：x1=x2=%6.2fnn,p);void root3(float a,float b,float c)float p,q;p=-b/(2*a);q=sqrt(-b*b+4*a*c)/(2*a);printf(nn方程的两个根为：x1=%6.2f+%6.2fi,x2=%6.2f-%6.2finn,p,q,p,q);8-3#include void main()int prime(int);int x;printf(输入一个正整数nn);scanf(%d,&x);if(prime(x)=0) printf(nn此数为素数nn);else printf(nn此数不是素数nn);int prime(int x)int i,flag;for(i=2;ix;i+)if(x%i=0)flag=1;break;else flag=0;return(flag);8-4#include void main()void exchange(int a33);int a33,i,j;printf(输入一个3*3的矩阵nn);for(i=0;i3;i+)for(j=0;j3;j+)scanf(%d,&aij);exchange(a);printf(nn转置后的矩阵为：nn);for(i=0;i3;i+)for(j=0;j3;j+)printf(%d ,aij);printf(n);8-5#include void main()void exchange(char str);char str80;printf(输入一个字符串nn);gets(str);exchange(str);printf(nn反序字符串为：nn);puts(str);void exchange(char str)int i,j,k;char temp;for(i=0;i+)if(stri=0) break;k=i/2;for(j=0;j=k;j+)temp=strj;strj=stri-1-j;stri-1-j=temp;stri=0;8-6#include void main()void strcat(char str1,char str2);char str180,str280;printf(输入str1nn);gets(str1);printf(nn输入str2nn);gets(str2);strcat(str1,str2);printf(nn连接后的字符串为：nn);puts(str1);void strcat(ch