#include <stdio.h>
#include <errno.h>
#include <setjmp.h>

jmp_buf env;
int i=3;
void myproc(int num);
void first(void);

int main() 
{ 
 first();
 printf("after first, i=%d\n",i);
}

void first (void) {
    int j=5,ret;
    
    if (0 ==  (ret=setjmp(env))) {
	printf("First call to setjmp\n");
	printf("i=%d, ret=%d\n",i,ret);
        j=3;
        myproc(0);
    } else {
	printf("Return from Long Jump\n");
	printf("j=%d, ret=%d\n",j,ret);
    }
    
}

void myproc(int num) {
    if (num < i)  {
       printf("In my proc,num= %d\n",num);
       myproc(num +1);
    }
    else 
      i=0;
       longjmp( env, 1);
    
}