remquo()

The remquo() function returns the remainder of two integer values, and stores an integer value with the sign and approximate magnitude of the quotient in a parameter.

Syntax

remquo(numerator, denominator, int* quotient)

The data type of the return value will either be a double, float, or long double. Combinations of these types will return a double. The parameter quotient must always be an int pointer.

The remquo() function calculates the floating-point remainder f of numerator / denominator such that numerator = n * denominator + f*, where n is an integer, f has the same sign as numerator, and the absolute value of f is less than the absolute value of denominator.

Example

The following example uses the remquo() function to calculate the remainders and quotients of multiple values:

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int q;
    double x = 12.5, y = 2.2;

    double result = remquo(x, y, &q);
    cout << "Remainder of " << x << "/" << y << " = " << result << endl;
    cout << "Quotient of " << x << "/" << y << " = " << q << endl << endl;

    x = -12.5;
    result = remquo(x, y, &q);
    cout << "Remainder of " << x << "/" << y << " = " << result << endl;
    cout << "Quotient of " << x << "/" << y << " = " << q << endl << endl;

    y = 0;
    result = remquo(x, y, &q);
    cout << "Remainder of " << x << "/" << y << " = " << result << endl;
    cout << "Quotient of " << x << "/" << y << " = " << q << endl << endl;

    return 0;
}

This produces the following output:

Remainder of 12.5/2.2 = -0.7
Quotient of 12.5/2.2 = 6

Remainder of -12.5/2.2 = 0.7
Quotient of -12.5/2.2 = -6

Remainder of -12.5/0 = -nan
Quotient of -12.5/0 = 0

Codebyte Example

The following example is runnable and uses the remquo() function to return the remainder and quotient of 12.5 / 10:

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