Determinant Calculator

C-program to calculate the determinant of a square matrix of any dimensions up to [100x100]

#include<stdio.h>
int main()
{
 int determinant(int A[][100],int n,int i,int s);
 int A[100][100],i,n,B[100];
 printf("Enter the number of rows or columns: \n");
 scanf("%d",&n);
 printf("Enter the square matrix: \n");
 for(int i=0;i<n;i++)
 {
  for(int j=0;j<n;j++)
  {
   scanf("%d",&A[i][j]);
  }
 }
 printf("The determinant is: \n");
 int s=0;
 s=determinant(A,n,i,s);
 printf("%d\n",s);
 fflush(stdin);
 getchar();
 return 0;
}
int determinant(int A[][100],int n,int i,int s)
{
 int B[100][100];
 int a=s;
 if(n==2)
 {
  return A[0][0]*A[1][1] - A[0][1]*A[1][0];
 }
 else
 {
  //int s=0;
  for(int j=0;j<n;j++)
  {
   int x=0;
   for(int p=1;p<n;p++)
   {
    int y=0;
    for(int q=0;q<n;q++)
    {
     if(q!=j)
     {
      B[x][y]=A[p][q];
      y++;
     }
    }
    x++;
   }
   if(j%2==0)
   {
    s+=A[0][j]*determinant(B,n-1,j,a);
   }
   else
   {
    s-=A[0][j]*determinant(B,n-1,j,a);
   }
  }
  return s;
 }
}
Output:
Enter the number of rows or columns: 4
Enter the square matrix: 
1 13 4 6
23 21 18 5
4 2 7 9
1 10 15 12
The determinant is: 
20353