Calculating Matrix Determinant in C

**Rilex** · 09-05-2009

Enter a 2x2 matrix of integers, calculate and display the determinant.
Tables with more than two dimensions: Proceed in the same way by adding elements of design.That restores my C code but I don't know what is the problem in the code.

Code:

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

  int determinant (int m [1] [1]) 
  ( 
   return ((m [0] [0] * m [1] [1]) - (m [1] [0] * m [0] [1])); 
  ) 
  void main () 
  ( 
      int M [1] [1], i, j; 
    
    
      for (i = 0; i <= 1; i + +) 
         for (j = 0 j <= 1 j + +) 
         ( 
               printf ( "Donez the value of M [% d] [% d]:", i + 1, j + 1); 
               scanf ( "% d", & M [i] [j]); 
         ) 
      printf ( "and determine the% d", determinant (M)); 
      getch (); 
      return 0; 
  )

**Katty** · 09-05-2009

Debug :

Code:

  E: \ l Angaga C \ a \ main.c | 13 | warning: return type of 'main' is not `int '| 
  E: \ C \ a \ main.c | | In function `main ': | 
  E: \ l Angaga C \ a \ main.c | 25 | warning: `return 'with a value, in function returning void |

0 errors with 2 warnings

**Zecho** · 09-05-2009

For additional dimensions, we can easily do so by recursion (through the development of row or column), although this is not really optimal.

**Rilex** · 09-05-2009

Code:

 int main (void);

and warnings disappears!

in the running it gives:

Code:

 Donez the value of M [1] [1]: 1 
  Donez the value of M [1] [2]: 2 
  Donez the value of M [2] [1]: 3 
  Donez the value of M [2] [2]: 4 
  and -5 determine the