# include <stdio.h>
# include <stdlib.h>
//
//  Here we "declare" the functions MATRIX_MIN() and MATRIX_PRINT():
//
double matrix_min ( int m, int n, double a[m][n] );
void matrix_print ( int m, int n, double a[m][n] );

int main ( )
{
  double a[4][3];
  int i;
  int j;
  int m = 4;
  int n = 3;
  int seed;

//
//  Here, we use TIME to get a different seed each time we run the program.
//
  seed = time ( 0 );
  srand ( seed );
//
//  Fill the array with random values.
//
  for ( i = 0; i < m; i++ )
  {
    for ( j = 0; j < n; j++ )
    {
      a[i][j] = ( double ) rand ( ) / ( double ) RAND_MAX;
    }
  }
//
//  Print the array using a function.
//
  matrix_print ( m, n, a );
//
//  Determine the minimum entry.
//
  printf ( "\n" );
  printf ( "  Minimum matrix entry is %g\n", matrix_min ( m, n, a ) );

  return 0;
}

double matrix_min ( int m, int n, double a[m][n] )
{
  int i;
  int j;
  double value;

  value = a[0][0];

  for ( i = 0; i < m; i++ )
  {
    for ( j = 0; j < n; j++ )
    {
      if ( a[i][j] < value )
      {
        value = a[i][j];
      }
    }
  }
  return value;
}


void matrix_print ( int m, int n, double a[m][n] )
{
  int i;
  int j;

  for ( i = 0; i < m; i++ )
  {
    for ( j = 0; j < n; j++ )
    {
      printf ( "  %10g", a[i][j] );
    }
    printf ( "\n" );
  }
  return;
}