C/code/阶乘和数（正序）.c

#include <stdio.h>

int factorial(int n) {
    int fact = 1;
    int i;
    for (i = 1; i <= n; i++) {
        fact *= i;
    }
    return fact;
}

int main() {
    int num, originalNum, sum = 0;
    int temp, power;

    scanf("%d", &num);

    originalNum = num;

    printf("%d,", originalNum);

    temp = originalNum;
    power = 1;
    while (temp > 0) {
        temp /= 10;
        power *= 10;
    }
    power /= 10;

    while (power > 0) {
        int d = originalNum / power;
        printf("%d!", d);
        sum += factorial(d);
        originalNum %= power;
        power /= 10;
        if (power > 0) {
            printf("+");
        }
    }

    if (sum == num) {
        printf("=%d\nYes\n", num);
    } else {
        printf("=%d\nNo\n", sum);
    }

    return 0;
}