第5章习题参考答案.doc

实用C语言简明教程第5章习题参考答案5-1D5-2B5-3(1)#include stdio.hmain() int i=0,a=0; while(i20) for(;) if(i%10=0) break; else i-; i+=11; a+=i; printf(%dn,a);输出结果：32(2)#include stdio.hmain() int i,j,b=0; for(i=0;i3;i+) for(j=0;j=i) b+; printf(%dn,b);输出结果：35-4#include stdio.hmain() int s,n; s=0;n=0; while(s1000) n+; s+=n*n; printf(n=%d,s=%dn,n-1,s-n*n);输出结果：n=13，s=8195-5#include stdio.hmain()int j, x, max, min, sum;float ave;printf(Enter 10 number:n);scanf(%d,&x);sum=max=min=x;for(j=2;jmax) max=x;else if(xmin) min=x;sum=sum-max-min;ave=sum/8.0;printf(The average is %.2fn,ave);5-6#include stdio.hmain()int i, sum;sum=0;for(i=1;i=1.0e-12)sum+=x;i+;while(x=1.0e-12);pi=sqrt(sum*6);printf(The pi is %fn,pi);5-8#include stdio.hmain()long x, sum=0;printf(enter a integer:n);scanf(%ld,&x);dosum+=x%10;x=x/10;while(x!=0);printf(The sum is %ldn,sum);5-9#include stdio.hmain()char c, ei=0,ni=0,si=0;printf(enter a string:n);for(;)c=getch();printf(%c,c);if(c=a&c=A&c=0&c=9)ni+=1;else if(c=32)si+=1;else if(c=13)break;else printf(enter error!);printf(The letter:%dnnumber:%dnspace:%d,ei,ni,si);5-10#include stdio.hmain()long a,product=1,i;printf(nPlease enter a integer:n);scanf(%ld,&a);for(i=2;ia;i+)if(a%i=0) if(isPrimeNumber(i) long b=a;while(b%i=0)product*=i;b=b/i; printf(The product of prime numbers is:%ld,product);int isPrimeNumber(lon