function program

#include <stdio.h>

void my_function();  // Declaring a function

int main()
{
  printf("Main function.\n");

  my_function();  // Calling the function

  printf("Back in function main.\n");

  return 0;
}

// Defining the function
void my_function()
{
  printf("Welcome to my function. Feel at home.\n");
}