How to Perform Modulus Operations on Doubles in C ?

Unable to Apply Modulus Operator to Doubles

In C , attempting to utilize the modulus (%) operator with double operands results in the error "invalid operands of types 'double' and 'double' to binary 'operator%'." This is because the % operator is designated for integer operations.

Solution: Utilizing the fmod() Function

To perform modulus operations on double-precision numbers, the fmod() function from the library can be employed. The fmod() function takes two double arguments and returns the remainder of the division of the first argument by the second.

Code Sample:

To illustrate, here's a revised version of your code that uses fmod():

#include <cmath>

int main()
{
    double x = 6.3;
    double y = 2.0;
    double z = std::fmod(x, y);
}

In this code, the fmod() function calculates the remainder of the division of x by y and stores the result in z. It's worth noting that the fmod() function uses the same arguments as the % operator but adjusts them to double precision.

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