programming-examples/c/_Basic/Create and Use Your Own Header File in C Programming.c

    #include<stdio.h>
    #include "myfirstheader.h"
     
    void main() {
       int num1 = 10, num2 = 10, num3;
       num3 = add(num1, num2);
       printf("Addition of Two numbers : %d", num3);
    }