Question

How to use modf() function to break a floating point into an integral and a fractional parts in C++

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

#define PI 3.14159265

int main()
{
	double fractional_part, int_part;

	fractional_part = modf(PI, &int_part);
	cout << PI << " = " << int_part << " + " << fractional_part << endl;

	return 0;

}

/*
run:

3.14159 = 3 + 0.141593

*/

 

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