Addition & Subtraction of Matrix in C

#include <stdio.h>
#include <conio.h>
#include <windows.h>
#define MAX 3
void create ( int [3][3] ) ;
void display ( int [3][3] ) ;
void matadd ( int [3][3], int [3][3], int [3][3] ) ;
void matmul ( int [3][3], int [3][3], int [3][3] ) ;
void transpose ( int [3][3], int [3][3] ) ;
int main( )
{
 int mat1[3][3], mat2[3][3], mat3[3][3], mat4[3][3], mat5[3][3] ;
 system ( "cls" ) ;
 printf ( "Enter elements for first array:\n\n" ) ;
 create ( mat1 ) ;
 printf ( "Enter elements for second array:\n\n" ) ;
 create ( mat2 ) ;
 printf ( "First Array:\n" ) ;
 display ( mat1 ) ;
 printf ( "Second Array:\n" ) ;
 display ( mat2 ) ;
 matadd ( mat1, mat2, mat3 ) ;
 printf ( "After Addition:\n" ) ;
 display ( mat3 ) ;
 matmul ( mat1, mat2, mat4 ) ;
 printf ( "After Multiplication:\n" ) ;
 display ( mat4 ) ;
 transpose ( mat1, mat5 ) ;
 printf ( "Transpose of first matrix:\n" ) ;
 display ( mat5 ) ;
 return 0 ;
}
/* creates matrix mat */
void create ( int mat[3][3] )
{
 int i, j ;
 for ( i = 0 ; i < MAX ; i++ )
 {
  for ( j = 0 ; j < MAX ; j++ )
  {
   printf ( "Enter the element: " ) ;
   scanf ( "%d", &mat[i][j] ) ;
  }
 }
 printf ( "\n" ) ;
}
/* displays the contents of matrix */
void display ( int mat[3][3] )
{
 int i, j ;
 for ( i = 0 ; i < MAX ; i++ )
 {
  for ( j = 0 ; j < MAX ; j++ )
   printf ( "%d\t", mat[i][j] ) ;
  printf ( "\n" ) ;
 }
}
/* adds two matrices m1 and m2 */
void matadd ( int m1[3][3], int m2[3][3], int m3[3][3] )
{
 int i, j ;
 for ( i = 0 ; i < MAX ; i++ )
 {
  for ( j = 0 ; j < MAX ; j++ )
   m3[i][j] = m1[i][j] + m2[i][j] ;
 }
}
/* multiplies two matrices m1 and m2 */
void matmul ( int m1[3][3], int m2[3][3], int m3[3][3] )
{
 int i, j, k ;
 for ( k = 0 ; k < MAX ; k++ )
 {
  for ( i = 0 ; i < MAX ; i++ )
  {
   m3[k][i] = 0 ;
   for ( j = 0 ; j < MAX ; j++ )
    m3[k][i] += m1[k][j] * m2[j][i] ;
  }
 }
}
/* obtains transpose of matrix m1 */
void transpose ( int m1[3][3], int m2[3][3] )
{
 int i, j ;
 for ( i = 0 ; i < MAX ; i++ )
 {
  for ( j = 0 ; j < MAX ; j++ )
   m2[i][j] = m1[j][i] ;
 }
}