C语言键盘输入一个正整数m，计算并输出1!+2!+...+m!的和

#include <stdio.h>

int main() {
    int m;
    printf("请输入一个正整数m：");
    scanf("%d", &m);

    int i, j, factorial = 1, sum = 0;
    for (i = 1; i <= m; i++) {
        factorial *= i; // 计算i的阶乘
        sum += factorial; // 累加到总和中
    }

    printf("1!+2!+...+%d!的和为：%d\n", m, sum);

    return 0;
}