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#include <stdio.h>
class math_stuff
{
char name[40];
int value;
public:
void bla();
math_stuff(char*);
~math_stuff();
void add(int);
void print_value(char*);
};
void math_stuff::bla()
{
printf("bla\n");
}
math_stuff::math_stuff(char* new_name)
{
sprintf((char *)this->name,(char *)"MATH_STUFF_%s",new_name);
value = 0;
}
math_stuff::~math_stuff()
{
printf((char *)"Deleting MATH_STUFF instance '%s'\n",this->name);
}
void math_stuff::add(int x)
{
this->value += x;
}
void math_stuff::print_value(char *where)
{
printf((char *)"current value of '%s' at '%s' = %d\n", this->name, where, this->value);
}
class derived : public math_stuff
{
char *dname;
int val;
public:
math_stuff stuff;
derived(char*);
~derived();
void print_all(char*);
};
derived::derived(char *der_name)
: ((char *)"hello, world!"), stuff("derived stuff"), val(10)
{
printf((char *)"derived name = %s\n", der_name);
dname = der_name;
stuff.add(6);
stuff.print_value ((char *)"grind");
}
derived::~derived()
{
printf ((char *)"Good bye! \n");
}
derived::print_all(char *msg)
{
printf((char *)"Here's the lowdown:\n");
printf((char *)"My name is %s\n", dname);
printf((char *)"My value = %d\n", val);
stuff.print_value ((char *)"low");
this->print_value((char *)"down");
printf((char *)"That's all you get tonight.\n\n");
}
main()
{
int pid;
int i;
pid = vfork();
if (pid > 0)
printf(" the inferior pid of the child is %d\n",pid);
if (pid == 0)
{
/* execl ("/bin/sh", "sh", "-c",argv[1],0);*/
math_stuff* a;
derived* d;
math_stuff b $ (" no gnus are good gnus ");
int child;
child = getpid();
printf( " the child from parent.c is %d\n",child);
ptrace (0);
a = new math_stuff((char *)"a");
d = new derived((char *)"two words");
a->add(2);
a->add(4);
a->add(5);
a->print_value((char *)"here");
a->add(7);
a->print_value((char *)"there");
a->add(3);
a->add(1);
a->print_value((char *)"end");
d->print_all ((char *)"all");
delete a;
delete d;
exit(0);
}
i = 5;
i = 6;
i = 7;
}
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