C++ Usage and examples of remainder() function

C++ Library Function <cmath>

C ++in which, the restder() function calculates the numerator/the floating-point remainder of the denominator (rounded to the nearest value).

remainder(x, y) = x　-　rquote　*　y

where, rquote is x/y's result, rounded to the nearest integer value (in half cases rounded to the nearest even number).

restder() prototype [from C ++ 11Standard]

double remainder(double x, double y);
float remainder(float x, float y);
long double remainder(long double x, long double y);
double remainder(Type1　x, Type2　y);　//　Additional overloads for other combinations of arithmetic types

restder() function accepts two parameters and returns a value of type double, float, or long double.

This function is in<cmath>are defined in the header file.

restder() parameters

• x -the value of the numerator.

• y -the value of the denominator.

restder() return value

restder() function returns x/y's floating-point remainder (rounded to the nearest value).

If the denominator y is zero, remainder() returns NaN (Not a Number).

Example1：How remainder() works in C ++How does remainder() work in C?

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

When the program is run, the output is:

Remainder　7.5/2.1　=　-0.9
Remainder　-17.5/2　= 0.5
Remainder　-17.5/0 =　-nan

Example2：remainder() function for different types of parameters

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
　　　　int x =　5;
　　　　double y =　2.13, result;
　　　　
　　　　result = remainder(x, y);
　　　　cout << "Remainder " << x << ""/" << y << " = " << result << endl;
　　　　return 0;
}

When the program is run, the output is:

Remainder　　5/2.13　= 0.74

　C++ Library Function <cmath>