Printing Fibonacci series (C Language)

Simple printing series using while() loop.

 //Fibonacci series in C

#include<stdio.h>

//1  2  3  5  8  13 ...

//a  b  

//   a  b

int main()

{

    int a, b, c;

    a = 1;

    b = 2;

    while (a < 90)

    {

        printf("%d\n", a);

        c = b;

        b = a + b;

        a = c;

    }

    return 0;

}