Dan

#include <stdlib.h>
#include <stdio.h>
static int *address;
void saveOrLaunch(int launch);
void printA()
{
    printf("printA-Begin\n");
    saveOrLaunch(0);
    printf("printA-Return\n");
}
void printB()
{
    printf("printB-Begin\n");
    saveOrLaunch(1);
    printf("printB-Return\n");
}
void saveOrLaunch(int launch)
{
    int* ptr = &launch;
    if (launch)
        ptr[-1] = address;
    else
        address = ptr[-1];
}
int main()
{
    printf("Main:  Running printA\n");
    printA();
    printf("Main:  Running printB\n");
    printB();
}

/*
$ ./a.out
Main:  Running printA
printA-Begin
printA-Return
Main:  Running printB
@@printB-Begin
@@printA-Return
*/