C语言调试示例

递归求阶乘和

#include<stdio.h>
long Recursion(int n) {
    if (n == 1 || n == 0) {
        return 1;
    }
    else {
        return  Recursion(n - 1) * n;
    }
}
int main()
{
    int flag = 1;
    int n = 0;
    printf("输入负数结束程序\n");
    while (flag) {
        printf("输入:");
        scanf_s("%d", &n);
        if (n < 0)
            flag = 0;
        long sum = 0;
        if (n >= 0) {
            for (int i = 1; i < n; i++) {
                sum += Recursion(i);
                printf("%d!+", i);
            }
            sum += Recursion(n);
            printf("%d!=%ld\n", n, sum);
        }
    }
    return 0;
}