Global Variable Declaration in C

Here is a sample program that will show you guys how to declare global variables in C language.

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Sample Program Output

Program Listing

global_variable.c

/* global_variable.c

   Author   : Jake Rodriguez Pomperada,BSCS,MAED-IT

   Date     : November 19, 2018   6:59 AM

   Location : Bacolod City, Negros Occidental

   Website  : http://www.jakerpomperada.com

   Emails   : jakerpomperada@jakerpomperada.com

              jakerpomperada@gmail.com

              jakerpomperada@yahoo.com

              jakerpomperada@aol.com

*/

#include <stdio.h>

// Global variable declaration.

int sum=0;

int main()

{

     // Local variable declaration.

     int a=0, b=0;

    // Actual variable initialization.

    a = 5;

    b = 10;

    sum = (a + b);

    printf("\n\n");

    printf("\tGlobal Variable Declaration Program");

    printf("\n\n");

    printf("\tThe sum of %d and %d is %d.",a,b,sum);

    printf("\n\n");

    printf("\tEnd of Program");

    printf("\n\n");

   return 0;

}