learning-cpp/q015.cpp at master · sofiarezende/learning-cpp · GitHub

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#include <iostream>

int main(){

	int var1{123}; // Declare and initialize
    std::cout << "var1 : "  << var1 << std::endl;

    var1 = 55; // Assign
    std::cout << "var1 : "  << var1 << std::endl;

    std::cout << std::endl;

    std::cout << "----------------" << std::endl;

    double var2 {44.55}; // Declare and initialize
    std::cout << "var2 : " << var2 << std::endl;

    var2 = 99.99; // Assign
    std::cout << "var2 : " << var2 << std::endl;

    std::cout << std::endl;

    std::cout << "----------------" << std::endl;

    std::cout << std::endl;
    bool state{false}; // Declare and initialize
    std::cout << std::boolalpha;
    std::cout << "state : " << state << std::endl;

    state = true; // Assign

    std::cout << "state : " << state << std::endl;


    //Auto type deduction
    //Careful about auto assignments
    auto var3 {333u}; // Declare and initialize with type deduction

    var3 = -22; // Assign negative number. DANGER!

    std::cout << "var3 : " << var3 << std::endl;


    return 0;
}