online compiler and debugger for c/c++

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/****************************************************************************** Welcome to code of Lập trình - Điện tử Series: C++ Author: Nghĩa Taarabt *******************************************************************************/ #include <iostream> using namespace std; // global variable int num; // function declaration int& test(); int main() { // assign 5 to num variable // equivalent to num = 5; test() = 5; cout << num; return 0; } // function definition // returns the address of num variable int& test() { return num; }

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