Each time I use

int main(int argc, char *argv[])

to try to get input from command line, there is a crash of the and it says:

"xxx.exe has stopped working". What's the problem?

I am trying to run the example code:

Code:

#include <iostream>
#include <stdlib.h>
#include "POINT.cpp"
using namespace std;
int main(int argc, char *argv[])
{ float d = atof(argv[2]);
int i, cnt = 0, N = atoi(argv[1]);
POINT *a = new POINT[N];
for (i = 0; i < N; i++)
for (int j = i+1; j < N; j++)
if (a[i].distance(a[j]) < d) cnt++;
cout << cnt << " pairs within " << d << endl;
return 0;
}
#include <math.h>
class POINT
{
private:
float x, y;
public:
POINT()
{ x = 1.0*rand()/RAND_MAX;
y = 1.0*rand()/RAND_MAX; }
float distance(POINT a)
{ float dx = x-a.x, dy = y-a.y;
return sqrt(dx*dx + dy*dy); }
};

I am new for C++, and desperate to fix the problem. Can anyone help me out?

Thanks very much!