C_数据结构_循环实现求阶乘

# include <stdio.h>

int main(void)
{
    int val;

    printf("请输入一个数字：");
    printf("val = ");
    scanf("%d", &val);

    for (i=; i<=val; ++i)
    {
        mult = mult * i;
    }
    printf("%d的阶乘是：%d\n", val, mult);

    return ;
}