PGM Help

I keep getting a segmentation fault when I run it.
Program will not get past the prinf line.
Here is my code

Code:

#include <fstream>
#include <iostream>
#include <cstdlib>
using namespace std;

int main(int argc,char **argv)

{
    int i,j,xres,yres,max,**image;
    ofstream fp;

// xres, yres, maxintensity, and image[][] must already be defined
    cin >> xres;
    cin >> yres;
    
    fp.open(argv[1]);
    cout << "P2" << endl;
    cout << xres << " " << yres << endl;
    cout << "255" << endl;      // Almost always equals 255
    for (i=0;i<xres;i++)
       for (j=0;j<yres;j++)
          printf("%4d", image[i][j]);
return 0;
}

 

So where is image initialized?
Why are you mixing C++ io (cin/cout) and C stdio (printf) you should pick one type or the other.


Jim

 

The Instructor wants me to use printf and not cout.
and image is initialized as an int.

 

No it's not. See those two asterisks? They change the meaning significantly. Also look at the comment; that should give you a clue. The reason for the segfault is basically that you've ignored the comment and are trying to use an uninitialised 2D array.