#include
int main() { int i,sum=0; i=1; while(i<=100) //循环条件应该是什么呢？ { sum=sum+i; i++; //这里是不是应该改变循环变量的值 } printf("100以内所有整数之和为：%d\n", sum); return 0; }
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#include<stdio.h>
头文件应该是#include<stdio.h>
#include <stdio.h>这里有问题