How do you make a input and output basic statement in C plus plus?

The most basic input/output operations can be performed with std::cin for input and std::cout for output. For example:

#include<iOStream>

int main (void) {

int n;

std::cout << "Enter a number: ";

std::cin >> n;

std::cout << "The value " << n << " was entered!\n";

}