c - Why does this code gives segmentation fault with some inputs? - 


//difference of 2 diagonals of n x n matrix #include <stdio.h> #include <string.h> #include <math.h> #include <stdlib.h>  int main() {      int n, j, i,k,l;     scanf("%d",&n);     int array[n-1][n-1], sum1=0, sum2=0, sum=0;     for(i=0;i<n; i++)         {         for(j=0; j<n; j++)             {             scanf("%d",&array[i][j]);         }     }     for(k = 0; k<n; k++){         sum1 += array[k][k];     }     for(l=0; l<n; l++){         sum2 += array[n-1-l][l];     }     sum = abs(sum1 - sum2);     printf("%d",sum);        return 0; }

the above code generates segmentation fault inputs. program calculates absolute difference between summation of values in 2 main diagonal.

the main problem, think, you're declaring array of size n - 1 × n - 1, filling in n elements. try declaring n×n.


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