Thread: sorting the matrix

Trying to sort matrix such that it has value in ascending order.

But outcome is coming :

Code:

Matrix after sorting :
2,2,2,2,
2,2,2,2,
2,2,2,2,
2,2,2,2,

Can't find whats wrong.

My code :

[code]
Trying to sort matrix such that it has value in ascending order.But outcome is coming :

Code:

Matrix after sorting :
2,2,2,2,
2,2,2,2,
2,2,2,2,
2,2,2,2,

Can't find whats wrong.

My code :

Code:

 #include<stdio.h>


void sort(int [][4]); 
int main( void)
{ 
  int i,j,Matrix[4][4] ={            /*Initializing array*/				
                         2,4,3,67,
					     6,8,2,7,
					     9,12,6,4,
						 12,4,5,7
					    };	
  sort(Matrix);										
 printf ( "Matrix after sorting : \n");
  
 for(i=0;i<4;i++)
 {
   for(j=0;j<4;j++)
    {
     printf("%d,",Matrix[i][j]);
	}
	printf("\n");
 }
}


void sort(int a[4][4])
 {
 int b[4][4] ;
 int i,j,x,y,temp;
  for(i=0;i<4;i++)
 {
   for(j=0;j<4;j++)
    {
     b[i][j]=a[i][j];
	}
 }
	for(i=0;i<4;i++)
	 {
	  for(j=0;j<4;j++)
	   {
	     for(x=i;x<4;x++)
		  {
			for(y=j;y<4;y++)
			 { 
			  if (a[i][j] > b[x][y])
			    temp = b[x][y];
				b[x][y]= a[i][j];
				a[i][j]= temp;
			 }
		  }
	   }
	 }
 }

Why is the program making a copy of the matrix in b, it can sort a in place if it's just using swaps. The program could also "cheat" by casting a[4][4] to an array ((int *)a)[...] and use an array sort.