C++ Programs

Programs are runable binaries created through multiple files

Creation

I have 2 files

// add.cpp
int add(int x, int y)
{
    return x + y;
}

// main.cpp
#include <iostream>
 
int add(int x, int y); // needed so main.cpp knows that add() is a function defined elsewhere
 
int main()
{
    std::cout << "The sum of 3 and 4 is: " << add(3, 4) << '\n';
    return 0;
}

make sure to have the C++ Forward Declaration for the other file’s functions then compile with g++ -o main main.cpp add.cpp