Thread: matrix determinant

I am writing a program to calculate the determinant of an n*n matrix. The issue is that the program ends abruptly without giving any error and does not return the result of the determinant. I am using Visual Studio c++ 2008 for the same. The code for the calculation of the matrix determinant is as follows:

insert

Code:

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>

int detmat(int *, int);

main(){

	int* arr, i,j;
	int result = 0, num, n=0, pos;


	printf("\n\rEnter the order of matrix");
	scanf("%d", &n);
	arr = calloc(n*n, 2);

	printf("Enter the elements");
	for(i =0;i<n;i++){
		for(j =0;j<n;j++){
			scanf("%d", &num);
			pos = i*n+j;
			arr[pos] = num;
		}
	}

	//print the matrix

	for(i=0;i<n;i++){
		for(j=i;j<n*n; j+= n){
			printf("\t%d", arr[j]);
		}
		printf("\n\r");
	}

	result = detmat(arr, n);
	free(arr);

	printf("\n %d", result);

	printf("\n\n\nPress any key to exit");
	getch();

}

int detmat(int *arr, int order){

	int *arr2, i,j,k, sign=1;
	int pos, newpos, count, sum =0;

	if(order == 1)
		return (arr[0]);

	for(i=0;i<order;i++, sign *= -1){

		arr2 = calloc((order-1)*(order-1),2);

		for(j=1;j<order;j++){			
			for(k=0,count =0;k < order;k++){

				if(k == i)
					continue;

				pos = j*order+k;
				newpos = (j-1)*(order-1) + count;
				arr2[newpos] = arr[pos];
				count++;
			}

		}

		sum = sum + arr[i]*sign*detmat(arr2, order-1);
		free(arr2);
	}

	return (sum);
}