Question

How to use nextafter() function to get the next representable float of from (x) in the direction of (y) in C++

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
	cout << "nextafter(0.0, 1.0) =  " << nextafter(0.0, 1.0) << endl;
	cout << "nextafter(0.0, -1.0) = " << nextafter(0.0, -1.0) << endl;
	cout << "nextafter(0.1, 0) = " << nextafter(0.1, 0) << endl;

	return 0;

}

/*
run:

nextafter(0.0, 1.0) =  4.94066e-324
nextafter(0.0, -1.0) = -4.94066e-324
nextafter(0.1, 0) = 0.1

*/

 

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