What is the difference between these two programs?

#include

using namespace std;

int DontPanic(int & x);

int z = 10;

void main()

{

char x = 'y';

int y = 5;

int z = 100;

y = DontPanic(z);

cout << x << " " << y << " " << z << endl;

}

int DontPanic(int & x)

{

int * p;

p = & z;

x = (*p)++ + 1;

cout << x << " " << *p << " " << z << endl;

return --z;

}

and

#include

using namespace std;

int DontPanic(int & x);

int z = 10;

int main()

{

char x = 'y';

int y = 5;

int z = 100;

y = DontPanic(z);

cout << x << " " << y << " " << z << endl;

}

int DontPanic(int & x)

{

int * p;

p = & z;

x = (*p)++ + 1;

cout << x << " " << *p << " " << z << endl;

return --z;

}