7.6.c

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

static void f1(int, int, int, int);
static void f2(void);


static jmp_buf  jmpbuffer;
static int      globval;

int main(void)
{
    int             autoval;
    register int    regival;
    volatile int    volaval;
    static int      statval;

    globval = 1;
    autoval = 2;
    regival = 3;
    volaval = 4;
    statval = 5;

    if (setjmp(jmpbuffer) != 0) {
        printf("after longjmp:\n");
        printf("globval = %d, autoval = %d, regival = %d, volaval = %d, statval = %d\n",
                globval, autoval, regival, volaval, statval);
        exit(0);
    }

    globval = 95;
    autoval = 96;
    regival = 97;
    volaval = 98;
    statval = 99;

    f1(autoval, regival, volaval, statval);
    exit(0);
}

static void f1(int i, int j, int k, int l)
{
    printf("int f1():\n"); 
    printf("globval = %d, autoval = %d, regival = %d, volaval = %d, statval = %d\n",
            globval, i, j, k, l);

    f2();
}

static void f2(void)
{
    longjmp(jmpbuffer, 1);
}