Gauss-Jacobi Method using C

/*

 Gauss-Jacobi Method
 Equation:8x+2y-2z=0,x-8y+3y=-4,2x+y+9z=12
*/
#include<conio.h>
#include<stdio.h>
void main()
{
 float ax,ay,az,x,y,z;
 int i,n;
 float f1(float,float);
 float f2(float,float);
 float f3(float,float);
 clrscr();
 printf("\nEnter the number of equations:: ");
 scanf("%d",&n);
 x=y=z=0;
 for(i=0;i<=n;i++)
 {
  ax=f1(y,z);
  ay=f2(z,x);
  az=f3(x,y);
  x=ax;
  y=ay;
  z=az;
 }
 printf("\nx= %f, y= %f, z= %f",x,y,z);
 getch();
}
float f1(float y,float z)
{
 return (8-2*y+2*z)/8;
}
float f2(float z,float x)
{
 return (4+x+3*z)/8;
}
float f3(float x,float y)
{
 return (12-2*x-y)/9;
}