/* Iterative program to print Fibonacci sequence.  doubles are used,
   as the values get big fast. */

#include <stdio.h>

main() {
    double prev1=1, prev2=1, next;
    printf("%2.0f\n%2.0f\n", prev1, prev2);  /* Display first two terms */
    do {
        next = prev1 + prev2;           /* Compute next term */
        printf("%2.0f\n", next);        /* display */
        prev1 = prev2; prev2 = next;    /* advance the saved terms */
    } while (next < 1000.0);
    return 0;
}