[2017.10.19]作业03(c)

1.

include<stdio.h>void main(){ int a,b,c; printf("请输入3个整型数据:"); scanf("%d%d%d",&a,&b,&c); if ((a>=b)&&(a>=c)) printf("最大的数是:%d\n",a); else if ((b>=a)&&(b>=c)) printf("最大的数是:%d\n",b); else printf("最大的数是:%d\n",c);}

2.

#include<stdio.h>int main(){ int a,i,j; double x,sum=0.0; for (j=1;j<=20;j++){ x=1; for (i=1;i<=j;i++){ x=x*i; } sum=sum+x; } printf("%lf",sum);} 

3.

#include<stdio.h>int main(){ int a,b,c,d,e; int A,B,C,D,E; printf("请输入五位整数数字："); scanf("%d%d%d%d%d",&a,&b,&c,&d,&e); a = a+6; b = b+6; c = c+6; d = d+6; e = e+6; A = e%8; B = d%8; C = c%8; D = b%8; E = a%8; printf("加密后的数字为：%d%d%d%d%d",A,B,C,D,E);