[C] 測是有沒有除了fmod可以取餘數的

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

double mod(double, double);

int main(void)
{
    double x, y;
    printf("Please input a number \n");
    scanf("%lf%lf", &x, &y);
   
    int a1 = x, a2 = y;

    printf("Intput %lf,  %lf\n",x, y);
    printf("Intput %d,  %d\n",a1, a2);

    printf("INT: %d\n",a1%a2);
    printf("INT: %d\n",(int)x%(int)y);
    printf("DOU: %f\n",mod(x,y));
    printf("DOU: %f\n",fmod(x,y));
    system("pause");
    return 0;
}


double mod(double a, double b){
    double sum = (int)a % (int)b;
    return sum;
}


答案是 沒有 !!!!!!!!!!!!!
%只能用在整數型態
要取浮點數的餘數, 請還是記得fmod吧, 他是在#include<math.h> 底下