The sum of numbers form 0 to n.(20.9.2017)

Posted 2020-10-08 RLee

#include <stdio.h>

int main() {
    int a,b,sum;
    printf("输入一个数字: ");
    scanf("%d",&a);                //输入数字a
    sum = 0;
    for(b=1;b<=a;b++){            //设置b=1 使用for loop，用b相加，一直加到输入的数字a的数值
        sum = sum + b;
    }
    printf("%d",sum);
}