Check out example codes for "c++ round to int". It will help you in understanding the concepts better.

Code Example 1

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int x = 15;
    double result;
    result = round(x);
    cout << "round(" << x << ") = " << result << endl;

    return 0;
}

Code Example 2

double round(double x);
float round(float x);
long double round(long double x);
double round(T x); // For integral type

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