c语言代码练习2(2)改进

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main(

)
{
    int num = 1;
    int x = 0;
    int sum = 0;
    for (x = 1; x <= 10; x++)
    {
        num = num * x;
        sum += num;
    }
    printf("for循环，1-10阶乘的和是%d", sum);


    return 0;
}