2-7

#include<stdio.h> int main(void) { int i,n,sum; printf("Enter n:"); scanf("%d",&n); sum=0; for(i=1;i<=n;i++){ sum=sum+i; printf("Sum of numbers from l to%d is %d\n",n,sum); return 0; }

转载于:https://www.cnblogs.com/liruijia199531/p/3356888.html