Solution Of Simultaneous Equation

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

//////////////////////////////////////////////////////////////
/////////////     Programmer : Harsh Chandra    /////////////
////////////////////////////////////////////////////////////

void main()
{ clrscr();
  float ar[10][10],s=0,x[10];
  int i,j,n,k=12;
  char m;
  printf("ENTER THE NUMBER OF INDEPENDENT VARIABLES   :");
  scanf("%d",&n);
  printf("\nENTER THE ELEMENTS OF AUGMENTED MATRIX ROWWISE  :");
  printf("\nFor Example :- First Eq :3x+2y+5z=4  ");
  printf("\n\t\tInput 3 2 5 4 and so on...");
  for(i=0;i<n;i++)
  {
	for(j=0;j<n+1;j++)
	{  printf("\nEnter the (%d,%d)th element:",i,j);
		scanf("%f",&ar[i][j]);
	}
  }
  for(i=0;i<n;i++)
  {
	for(j=0;j<n;j++)
	{  if(i!=j)
	  {  s+=abs(ar[i][j]);
	  }
	}
	  if(abs(ar[i][i])<s)
	  k=0;
	  s=0;
  }
  if(k!=12)
  {  printf("\n\nTHE SYSTEM OF EQUATIONS YOU HAVE ENTERED CANNOT BE SOLVED BY GUASS SEIDEL METHOD AS IT IS NOT DIAGONALLY DOMINANT");
	  getch();
	  exit;
  }
  if(k==12)
  {  for(i=0;i<n;i++)
	  x[i]=0;
  do
  {
	for(i=0;i<n;i++)
	{	x[i]=ar[i][n];
		for(j=0;j<n;j++)
	 { if(i!=j)
		x[i]-=(ar[i][j]*x[j]);
	 }
	 x[i]=x[i]/ar[i][i];
	}
	 for(i=0;i<n;i++)
	 printf("\nx[%d] = %f",i,x[i]);
	 printf("\nIs it accurate or u want to proceed(enter Y if u wanna proceed) : ");
	 m=getche();
}while(m=='y'|| m== 'Y');
}
getch();
}