#include <stdio.h>

/* declaration de la fonction*/
void addition();
/* declaration variable globale  */
int a=10, b=20;


int main () {
	
	/* declaration variable local  */
	int c;
	c=a+b;
	printf ("Valeur de a = %d, b = %d and c = %d dans le programme principal \n", a, b, c);
	
	addition();

       	getchar ();
	
        return 0;
}

void addition(){
	/* declaration variable local  */
	int c;
	
	c=a+b;
	
	printf ("Valeur de a = %d, b = %d et c = %d dans la fonction addition \n", a, b, c);
	
}