第八次作业
#include <stdio.h> #include <stdlib.h> #include <time.h> main(){ int x,guess; srand((unsigned int)time(NULL)); guess=rand()%100; while(1){ printf("请输入数字\n"); scanf("%d",&x); if(x>guess){ printf("高了\n"); } else if(x<guess){ printf("低了\n"); } else{ printf("猜对了\n"); break; } } }
#include<stdio.h> main() { int i,k=1; float sum=0; for(i=1;i<=100;i++) { sum+=k*1.0/i;k=-k; } printf("sum=%f\n",sum); }
#include<stdio.h> main(){ int i,n,sum=0,result=0; printf("input n:\n"); scanf("%d",&n); for(i=1;i<=n;i++){ sum+=i; result+=sum; } printf("s=%d",result); }
#include<stdio.h> main(){ long x; int temp=0,num=0; printf("请输入一个整数:\n"); scanf("%ld",&x); printf("它的每一位数字是:\n"); while(x>0) { printf("%3d",x%10); temp=temp*10+x%10; x=x/10; num++; } printf("\n它是一个%d位数.\n",num); printf("它的逆序是:%d\n",temp); }