Problem

A window(general protection exception) pops up when I try to compile this:

Code:

//Filename: ptch.cpp
//Fuction: Patch Testing
#include <fstream.h>
#include <conio.h>
#include <string.h>
#include <stdio.h>
int main(void)
{
	char *p;
	char input[100];
	ifstream b_file("patch.txt");
	b_file >> input;
	b_file.close();
	int lp=1;
	while(lp!=0)
	{
		char nl[]="\n";
		strcpy(p,nl);
      lp=lp-1;
	}
	p = strtok(input, "2");
	if(p) cout << p;
	clrscr();
	p = strtok(NULL, "2");
	cout << p;
	getch();
}

The notepad file(in the same directory) says this:

Code:

A1Star
M2Wars

What's wrong?

A pointer that points to nothing or a random memory location isn't much use. You need to point p at some area of memory before you can use it. Apart from that I'm not really sure what you're trying to do.