#include <stdio.h>
int i =0;      //Global variable
main()
{
int j;        // local variable in mainvoid f1(void)  ;        
i =0;
printf("value of i in main %d\n",i);
f1();
printf("value of i after call%d\n",i);
}
void f1(void)
{
int k;        // local variable for f1.
i = 50;
}