Simple Fork Program in Linux/Unix C

#include
int glob=6;
char buf[]="a write to stdout\n";
main()
{
int var;
int pid;
var=88;
printf("Before Fork\n");
if((pid=fork())<0)
printf("fork Error\n");
else if(pid==0)
{
glob++;
var++;
} else
printf("\nPID= %d ,GLOB = %d,VAR = %d\n",getpid(),glob,var);
exit(0);
}