C++ Rounding: Round to Nearest Whole Number

In C++, you can use the standard library function round() to perform rounding for integers. The declaration of this function is included in the header file, and its usage is as follows:

#include <cmath>

double num = 3.14;
int roundedNum = std::round(num);

In the above example, the std::round() function rounds 3.14 to the nearest integer, which is 3, and assigns the result to the variable roundedNum.