c - 下面的阶乘查找 C 程序有什么错误？

Question

我的逻辑是输入num存储到temp变量中，并使用temp = temp * (num - i)在内查找阶乘while 直到 num 大于 0 且最初为 i = 1 ，但我遇到问题，我的循环进入无限循环如何解决这个问题？

#include <stdio.h>

int main() {
    int num, temp, i;

    printf("Enter a Num who's factorial is need to be find : ");
    scanf("%d", &num);
    printf("num = %d\n", num);
    temp = num;
    printf("temp =  %d\n", temp);
    i = 1;
    while (num > 0) {
        temp = temp * (num - i);
        i++;
        printf(" i = %d\n ", i);
    }
    printf("fact = %d \n ", temp);
    return 0;
}

Answer 1

您正在检查num > 0但从未更新 num inside 的值循环

更新它以检查num - i > 0或num > i

while(num - i > 0)
{
    temp = temp * (num-i);
    i++;
    printf(" i = %d\n ",i);
}