C++ How to use the fmod() function and examples

C++ Library Function <cmath>

fmod(x, y) = x　-　tquote　*　y

where tquote is truncated, that is, x / y's result (rounded).

fmod() prototype [from C ++ 11Standard Library]

double fmod(double x, double y);
float fmod(float x, float y);
long double fmod(long double x, long double y);
double fmod(Type1　x, Type2　y);　//additional overloads for other arithmetic type combinations

The fmod() function accepts two parameters and returns a value of type double, float, or long double. This function is used for<cmath>are defined in the header file.

fmod() parameters

• x: The value of the numerator.

• y: The value of the denominator.

The fmod() return value

The fmod() function returns x / y's floating-point remainder. If the denominator y is zero, then fmod() returns NaN (Not a Number).

Example1: How does the fmod() function work in C ++how does it work in C?

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
　　　　double x =　7.5, y =　2.1;
　　　　double result = fmod(x, y);
　　　　cout << "Remainder " << x << ""/" << y << " = " << result << endl;
　　　　
　　　　x =　-17.50, y =　2.0;
　　　　result = fmod(x, y);
　　　　cout << "Remainder " << x << ""/" << y << " = " << result << endl;
　　　　
　　　　return 0;
}

When running the program, the output is:

Remainder　7.5/2.1　=　1.2
Remainder　-17.5/2　=　-1.5

Example2: The fmod() function is used for different types of parameters

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
　　　　double x =　12.19, result;
　　　　int y =　-3;
　　　　
　　　　result = fmod(x, y);
　　　　cout << "Remainder " << x << ""/" << y << " = " << result << endl;
　　　　
　　　　y = 0;
　　　　result = fmod(x, y);
　　　　cout << "Remainder " << x << ""/" << y << " = " << result << endl;
　　　　return 0;
}

When running the program, the output is:

Remainder　12.19/-3　= 0.19
Remainder　12.19/0 =　-nan

　 C++ Library Function <cmath>