Compile the following: #include using namespace std; int num; int& test(); int main() { } test()...

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Compile the following: #include using namespace std; int num; int& test(); int main() { } test() = 5; cout < < num: return 0; int& test() 5 { return num; } Compile the following: #include using namespace std; int num; int& test(); int main() { } test() = 5; cout < < num: return 0; int& test() 5 { return num; }