C fmod Function: Usage & Examples

The fmod function is a mathematical library function in the C language, used to calculate the remainder of two floating-point numbers. Its prototype is as follows:

double fmod(double x, double y);

In this case, x and y represent the dividend and divisor, and the function returns the remainder of x divided by y.

The steps for using the fmod function are as follows:

1. import the math.h library
2. Calculate the remainder of dividing x by y and store it in the variable result.
3. Handle the return value: store the remainder of x divided by y in the result variable.

Sample code:

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

int main() {
    double x = 10.5;
    double y = 3.0;
    
    double result = fmod(x, y);
    
    printf("x除以y的余数为: %.2f\n", result);
    
    return 0;
}

The above code will display: the remainder of x divided by y is 1.50.