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1、C语言程序设计第三版谭浩强课后习题答案完整版1.5#include void main()printf(* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *n);printf( Very good! n);printf(* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *n);1.6#include void main()float max(float x,float y,float z);float a,b,c;printf(请分别输入a
2、,b,c:n);scanf(%f,%f,%f,&a,&b,&c);printf(max=%f,max(a,b,c);float max(float x,float y,float z)float m,n;m=xy? x: y;n=mz? m: z;return(n);3.6#include void main()char c1=a,c2=b,c3=c,c4=101,c5=116;printf(“a%c b%ctc%ctabcn”,c1,c2,c3);printf(“tb%c %cn”,c4,c5);3.9.1#include void main()double x=2.5,y=4.7,z;in
3、t a=7;z=x+a%3*(int)(x+y)%2/4;printf(该表达式的值为：%f,z);3.9.2#include void main()int a=2,b=3;float x=3.5,y=2.5,z;z=(float)(a+b)/2+(int)x%(int)y;printf(该表达式的值为：%f,z);4.5#include void main()int a=5,b=7;double x=67.8564,y=-789.124;char c=A;long n=1234567;unsigned u=65535;printf(%d%dn,a,b);printf(%3d%3dn,a,b)
4、;printf(%f,%fn,x,y);printf(%-10f,%-10fn,x,y);printf(%8.2f,%8.2f,%.4f,%.4f,%3f,%3fn,x,y,x,y,x,y);printf(%e,%10.2en,x,y);printf(%c,%d,%o,%xn,n,n,n);printf(%ld,%lo,%xn,n,n,n);printf(%u,%o,%x,%dn,u,u,u,u);printf(%s,%5.3sn,COMPUTER,COMPUTER); 4.6#include void main()int a,b;float x,y;char c1,c2;scanf(a=%d
5、 b=%d,&a,&b);scanf( %f %e,&x,&y);scanf( %c %c,&c1,&c2);4.7#includevoid main()int a,b;float x,y,z;char c1,c2;scanf(%5d%5d,&a,&b);scanf(%f%f%*f%f,&x,&y,&z);scanf(%c%c,&c1,&c2);4.8#include #define pi 3.14void main()float r,h,l,s1,s2,v1,v2;printf(请输入r，h的值：n);scanf(%f,%f,&r,&h);l=2*pi*r;s1=pi*r*r;s2=4*s1
6、;v1=4/3*pi*r*r*r;v2=s1*h;printf(圆周长为：%.2fn,l);printf(圆面积为：%.2fn,s1);printf(圆球表面积为：%.2fn,s2); printf(圆球体积为：%.2fn,v1); printf(圆柱体积为：%.2fn,v2);5.5 #include void main()float x,y;printf(请输入x的值：n);scanf(%f,&x);if(xy=x;elseif(x=1&xy=2*x-1;elsey=3*x-11;printf(x与y的值分别为：n%f,%f,x,y); printf(n);5.6 #include voi
7、d main()float b;int a;printf(请输入该同学的成绩：n);scanf(%f,&b);while (bprintf(输入有误，请重新输入：n);scanf(%f,&b);a= int(b/10);if(aswitch(a)case 10:case 9: printf(该同学为等级：A);break;case 8: printf(该同学为等级：B);break;case 7: printf(该同学为等级：C);break;case 6: printf(该同学为等级：D);break;case 5: printf(该同学为等级：E);break;#include #incl
8、ude void main()int x,y,m,n,i=1,j=0;printf(请给出一个不多于5位的正整数:n);scanf(%d,&x);while(x printf(输入有误n请给出一个不多于5位的正整数:n);scanf(%d,&x);for(n=0;ny=int(x/pow(10,n);if(y0&ym=n+1;printf(它是%d位数n,m);printf(从高到低位依次为n);doprintf( %d,int(x/pow(10,m-i)%10);i+;while(m-i=0);printf(n逆序输出为n);doprintf( %d,int(x/pow(10,j)%10);
9、j+;while(j-mprintf(n);6.1输入两个正整数m和n，求其最大公约数和最小公倍数。#include void main()int m,n,i,j;printf(请分别输入m，n的值：n);scanf(%d,%d,&m,&n);for(i=1;iif(m%i=0&n%i=0)j=i;printf(这两个整数的最大公约数是：%d,j);for(i=j;i+)if(i%m=0&i%n=0) break;printf(这两个整数的最小公倍数数是：%d,i);printf(n);6.2 题目：输入一行字符，分别统计出其中英文字母、空格、数字和其他字符的个数。#include void
10、main()int i=0,j=0,k=0,x=0;char c;printf(请输入一行字符串：n);while(c=getchar()!=n)if(c=A&celse if(c= ) j+;else if(c=0&celse x+;printf(英文字母、空格、数字、其他字符的个数分别为：%d,%d,%d,%d,i,j,k,x); printf(n);6.3求S n=a+aa+aaa+aaa之值，其中a是一个数字。例如：222222222222222（此时n5），n由键盘输入。#include#includevoid main()int i,n;int sum=0,s=0;printf(请
11、输入n的值：n);scanf(%d,&n);while(nprintf(请重新输入n的值：n);scanf(%d,&n);for(i=0;is+=pow(10,i);sum+=2*s;printf(sum=%dn,sum);6.8 题目：有一分数序列2/1,3/2,5/3,8/5,13/8,21/13,求出这个数列的前20项之和。#includevoid main()int a=1,b=1,i;float sum=0.0;for(i=0;ia=a+b;b=a-b;sum+=(float)a/b;printf(这个数列前二十项之和为：n%f,sum); printf(n);7.2#include
12、void main() int i,j,t,a10;printf(请输入十个整数：n);for(i=0;iscanf(%d,&ai);for(j=1;jfor(i=0;iif(ait=ai;ai=ai+1;ai+1=t;printf(这十位数从大到小排列为：n);for(i=0;iprintf(%5d,ai);printf(n);7.3#includevoid main()int i,j,m,n,a33;printf(请输入3*3的整形矩阵n);for(i=0;ifor(j=0;jscanf(%d,&aij);m=a00+a11+a22;n=a02+a11+a20;printf(3*3的整形矩
13、阵对角线元素之和为：n);printf(%d,%d,m,n);7.4#includevoid main()static int a10=1,5,6,10,20,24,55,58,64;int i,t;printf(请输入一个数：n);scanf(%d,&a9);for(i=9;i0;i-)if(ait=ai-1;ai-1=ai;ai=t;for(i=0;iprintf(%4d,ai);printf(n);7.8#includevoid main()int a55,b5,c5,d55;int i,j,k,l;printf(请输入5*5的整型数组n);for(i=0;ifor(j=0;jscanf
14、(%d,&dij);for(i=0;ifor(j=0;jaij=dij;for(i=0,k=0;ifor(j=0;jif(aij=aij+1)bk=aij+1=aij;elsebk=aij+1;for(j=0,l=0;jfor(i=0;iif(aijcl=ai+1j=aij;elsecl=ai+1j;for(i=0,k=0;ifor(j=0,l=0;jif(dij-bk=0)if(dij-cl=0)printf(鞍点为d%d%d=%dn,i,j,dij);elseprintf(没有鞍点n);7.10#include#includevoid main()int i,j=0,k=0,l=0,m=0
15、,n=0;char str0301,str1100,str2100,str3100;gets(str1);gets(str2);gets(str3);strcat(str0,str1);strcat(str0,str2);strcat(str0,str3);for(i=0;str0i!=0;i+)if(str0i=A&str0ielse if(str0i=a&str0ielse if(str0i=0&str0ielse if(str0i= ) m+;else n+;printf(大写字母、小写字母、数字、空格以及其他字符的个数依次为：n); printf(%5d %7d %5d %6d %4d
16、n,j,k,l,m,n);printf(n);7.14#include #include void main()int i=0,resu;char s1100,s2100;printf(n 请输入string1：);gets(s1);printf(n 请输入string2：);gets(s2);while(s1i=s2i&s1i!=0)i+;if(s1i=0&s2i=0) resu=0;else resu=s1i-s2i;printf(n result：%dn,resu);8.1#includevoid main()int maxgy(int m,int n);int mingb(int o,
17、int p);int a,b;printf(请输入两个正整数：a，bn);scanf(%d,%d,&a,&b);while(aprintf(注：请输入两个正整数：a，bn);scanf(%d,%d,&a,&b);printf(这两个数的最大公约数是：%d,maxgy(a,b);printf(这两个数的最小公倍数是：%d,mingb(a,b);printf(n);int maxgy(int m,int n)int i,k;for(i=1;iif(m%i=0&n%i=0)k=i;return k;int mingb(int o,int p)int j;for(j=o;j+)if(j%o=0&j%p
18、=0)break;return j;8.3#includevoid main()int judss(int m);int a;printf(请输入一个正整数：);scanf(%d,&a);while(aprintf(注：请输入一个正整数：);scanf(%d,&a);judss(a);printf(n);int judss(int m)int i;for(i=2;iif(m%i=0) break;if(ireturn printf(这个数不是素数);elsereturn printf(这个数是素数);8.5#include#includevoid main()char fx(char str1100);char str0100;printf(请输入一个字符串:n);gets(str0);fx(str0);puts(str0);char fx(char str1100) int i,j,k=strlen(str1);char str2100;strcpy(str2,str1);for(i=0,j=k-1;j-1;i+,j-)str1i=str2j;return str1100;