Input

Headers

#include <iostream>

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User input

int age;
std::cout << "How old are you? ";
std::cin >> age;

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User input (Handling error)

std::cout << "How old are you again? ";
if (!(std::cin >> age)) {
    std::cout << "There is an error in your input\n";
    return 1;
}

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Consuming input

if (age >= 18) {
    std::cout << "Welcome!\n";
} else {
    std::cout << "Sorry.\n";
    return 1;
}

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