C语言课后题答案.doc

2. #includemain() int i,sum=0; int n=0 float ave; while(scanf(%d,&i)&i!=0) sum+=i;n+; ave=sum/n; printf(sum=%d,ave=%.2f,sum,ave);return 0; 第四章课后题作业 三编程题1.#includemain() int a,b,c; scanf(“%d%d%d”,&a,&b,&c); if （ab &ac） if (bc) printf(“min=%dn”,b); else printf(“min=%dn”,c); if (ab &ac) printf(“min=%dn”,a); return 0; 3. #include main() int a,e,g,s,b,q; q=0; b=0; s=0; g=0;printf(请输入一个四位数：,a);scanf(%d,&a); q=a/1000; b=(a/100)%10; s=(a%100)/10; g=(a%100)%10;e=1000*g+100*s+10*b+q; printf(新的是四位数是：e=%d,e);return 0; 4.#include int main() int r,y,b,m; m=0; printf(r y bn);for(r=0;r=3;r+) for(y=0;y=3;y+) b=8-r-y;if(r+y+b)=8) m+; m=m-3; printf(%dn,m);return 0; 第五张课后编程题:1.#include #define n 10 int main() int i; float ave,sum,an; sum=0; for(i=0;i=n;i+) scanf(%f,&ai); printf(请输入数值:n,n); sum+=ai; ave=sum/n; printf(ave=%.2fn,ave); return 0; 5. #includevoid main()int q=1,s=1;printf(%d,q);for(int i=0;i=19;i+)s=s*3; printf(+%d,s); q=q+s;printf(=%d,q);2.#include#define N 5 void sort(int v,int n) int i,j,t; for (i=1;in;i+) for (j=0;jvj+1) t=vj; vj=vj+1; vj+1=t; int main() int aN,i; for(i=0;iN;i+) scanf(“%d”,&ai); sort(a,N); for(i=0;iN;i+) printf(“%8d”,ai); return 0; 3. #include void main() int i,j; float a303,he1,he2,he3,ave1,ave2,ave3; sum1=0; sum2=0; sum3=0; for(i=0;i30;i+) for(j=0;j3;j+) scanf(%f,&aij); for(i=0;i30;i+) he1+=ai0; he2+=ai1; h3+=ai2; ave1=he1/30; ave2=he2/30; ave3=he3/30; printf(ave1=%.2fn, ave1); printf(ave2=%.2fn,ave2); printf(ave3=%.2fn, ave3);5. #include #include void main() char s60 = 0; char c; int i = 0; while(i != 60) c = getch(); putchar(c); if(c = n) break; si = c; +i; i = 0; putchar(n); while (i != 60) if (si != & (si 9) ) putchar(si); +i; getchar();4. #include void main() int i,j,a33,max,l,andian,x; l=0; x=0; for(i=0;i3;i+) for(j=0;j3;j+) scanf(%d,&aij); for(i=0;i3;i+) max=ai0;for(j=1;j3;j+) if(maxaij) max=aij; l=j; andian=max;for(j=0;j=ajl)x=ajl;if(andian=x)printf(hang=%d lie=%d andian=%dn,i+1,l+1,andian);else printf(hang=%d lie=%d non,i+1,l+1); 2. #include#includeint prime(int n)int i;if(n%2=0)return(0);for(i=3;in/2;i+)if(n%i=0)return(0); return(1);void main() int m,n,i,js=0; long he=0; printf(请输入m和n的数值:n); scanf(%d%d,&m,&n); for(i=m;i=n;i+) if(prime(i) js+; he+=i; printf(%d与%d之间素数个数:%dn,m,n,js); printf(%d与%d之间素数之和:%ldn,m,n,he); 第六章课后题1 #includeint main()long max(int,int); int a,b; printf(请输入数值:n); scanf(%d%d,&a,&b); printf(max=%d,max(a,b);return 0;long max(int m,int n) int c;if(mn) c=m;elsec=n; return c;7. #include#define SWAP(a,b) t=b;b=a;a=t;main()int a,b,t;printf(输入a和b:);scanf(%d%d,&a,&b); SWAP(a,b); printf(交换后:a=%d,b=%dn,a,b);4. #include#includeint reverse(int number) int d1,d2=0; do d1=number%10; number/=10; d2=d2*10+d1; while(number0); return d2;void main()int i;printf(请输入原始数字:); scanf(%d,&i);printf(逆序数是:%d,reverse(i); printf(n);3. #include#includeint is(int number)int he,temp,g,r;he=0;temp=number;while(number!=0) g=number%10; he+=pow(g,3); number=number/10;if(he=temp)r=1;elser=0;return r;void main() int i,m,n;int is(int number); printf(输入m和n的数值:); scanf(%d%d,&m,&n); for(i=m;i=n;i+) if(is(i)printf(这些数字是:%d,i);printf(n); 5. #include void dt (int x)if(x/10=0)printf(%3dn,x); else printf(%3d,x%10); x/=10; dt( x);printf(n);int main()int n;printf(请输入一个整数 :);scanf(%d,&n);if(n0)dt(n);return 0;8. #include#define jm 1void main()char c;printf(请输入字符串:);c=getchar();while(c!=n) #ifdef jm if(c=a&c=A&cz|cZ&c=Z+3) c=c-26; #endif printf(%c,c); c=getchar();6#include using namespace std; void main() double x; int n; double fun(double x,int n); printf(请输入x和n); s