Thread: .exe has stopped working

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!

Thanks for your reply!

The lower part is the source code for "POINT.cpp", sorry for the confusion. I tried putting these two files into a project(One still needs to include "POINT.cpp" in the main file, right? Otherwise, a lot of things will not be declared.). There is still the problem.

This may be a stupid question, but I can't figure it out.

When using debugger:
I recevied the following message:

Program received signal SIGSEGV, Segmentation fault.
In msvcrt!_atof_l () (C:\Windows\system32\msvcrt.dll)
At D:\Documents\C++\Algorithms in C++\cloest-point.cpp:7

What does it mean? Is there anything wrong with line 7 in the main file, which is

Code:

{ float d = atof(argv[2]);

I appreciate any help!

It probably means one of two things. One are you sure that argv[2] even exists? You should check that the number of arguments are correct. Two are you sure that argv[2] starts with a number and not a character?

What are your command line arguments?


Jim

Why are you including a .cpp file??? Bad, bad, bad!!!

Originally Posted by jimblumberg

It probably means one of two things. One are you sure that argv[2] even exists? You should check that the number of arguments are correct. Two are you sure that argv[2] starts with a number and not a character?

What are your command line arguments?


Jim

I am not even allowed to input anything in the command line before the crash. It comes out with a black command window(.exe) and a microsoft window saying that ".exe has stopped working". It happens with every file with

Code:

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

BTW, I copied the code from a book about C++.

You add the command line arguments to the command line like: "myprogram test 100.0" see this link:Command line arguments.


Jim