/* * Author : ~swim~ * Date : 02-Jul-2018 * Description : This code is created in response to the query asked by Dipen here https://www.sololearn.com/Discuss/1349922/?ref=app Diect link is there in the comment section Query is - can main be defined inside the body of a user defined function The short answer is NO but a slightly long answer is that you can define main function in the body of another function in the form of lambda functions and you can have as many as you want but limited by block scope. But whatever you do there has to be a one and only one main in the global scope else your program won't compile (actually link) https://code.sololearn.com/cNMo78mhWquJ/?ref=app */ #include using namespace std; void Myfunc () { auto main = []() { // do whatever you want here. cout << "main in my Myfunc" << endl; return 0; // not required }; // call main main();//prints "main in my Myfunc" } int main() // <-- (1) MUST be there { auto main = []() // <-- (2) { cout << "main (2)" << endl; auto main = []() // <-- (3) { cout << "main (3)" << endl; }; main(); // <-- calls (3) }; main(); // <-- calls (2) { // <-- Block B1 starts auto main = []() //<-- (4) { cout << "main (4) in B1" << endl; { // <-- start B2 auto main=[]() //<--(5) { cout << "main (5) in B2" << endl; }; main();// calls main (5) }// end B2 }; main(); // calls main (4) } // end B1 Myfunc (); // indirectly calls main in // Myfunc } // end of main main

main_everywhere.cpp