Question

I write a simple code in C++ and I compile it with g++ on linux ubuntu 11.04 and I don’t get any errors but when I run the executable file, I get this error “segmentation fault”.

I know that my code has no problem and tHat this error is related to the compiler.

Can somebody help me?

My code is :

#include <math.h>
int main()
{
    double a[200][200][200],b[200][200][200],c[200][200][200];
    int i,j,k;

    double const pi=3.14;

    for(k=0;k<200;k++)
    {
        for(j=0;j<200;j++)
        {
            for(i=0;i<200;i++)
            {
                a[i][j][k]=sin(1.5*pi*i)*cos(3.5*pi*j)*k;
                b[i][j][k]=cos(1.5*pi*i)*cos(2.5*pi*k)*j;
                c[i][j][k]=a[i][j][k]-b[i][j][k];
            }
        }
    }
}

Answer 1

This function can help you:

double ***alloc3d(int l, int m, int n) {
    double *data = new double [l*m*n];
    double ***array = new double **[l];
    for (int i=0; i<l; i++) {
        array[i] = new double *[m];
        for (int j=0; j<m; j++) {
            array[i][j] = &(data[(i*m+j)*n]);
        }
    }

    return array;
}