Input
Output
#include <iostream> using namespace std; namespace first { void welcome() { cout << "Welcome To First Namespace" << endl; } } namespace second { void welcome() { cout << "Welcome To Second Namespace" << endl; } } namespace third { void welcome() { cout << "Welcome To Third Namespace" << endl; } } int main() { first::welcome(); // Calls function from first namespace. second::welcome(); // Calls function from second namespace. third::welcome(); // Calls function from third namespace. return 0; }