C Program That Print The Patterns Using Fibonacci Sequence

Hello friends today i'm sharing an interesting program,please read this code i make this code very easy to all of you,it really helps you,i used only a simple concepts of c language.

0
1 1
2 3 5
8 13 21

#include<stdio.h>
#include<conio.h>
int main()
{
 int i,j,a=0,b=0,c=1;
 clrscr();
 printf("\n HERE IS YOUR PATTERN:\n\n");
 for(i=1;i<=4;i++)
 {
  for(j=1;j<=i;j++)
  {
   if(i==1 &&j==1)
    printf(" 0");
   else if(i==4 && j==4)
    printf("  ");
   else
   {
    printf(" %d",c);
    a=b;
    b=c;
    c=a+b;
   }
  }
  printf("\n");
 }
 getch();
 return(0);
}

    Thanking You Friends...