// programme fils.c 
#include <stdio.h>
#include <unistd.h>

int glob=10;

void Processus_P1()
{
	    int x;
 		x=glob;
        x=x+7;
	    glob = x;
		printf("ici processus P1, glob = %d\n", glob);
	  
}

void Processus_P2()
{
	   int x;
       x=glob;
       x=x-2;
	   glob = x;
       printf("ici processus P2 , glob = %d\n",glob);
}

int main ( )
 {
     printf("  Befor call of P1 & P2 -->   glob = %d \n",glob);
	 Processus_P1();
	 Processus_P2();
	 printf(" After call of P1 & P2 -->  glob = %d \n",glob);
     return 0;
 }