fibonacci/fibo.c

// Fibonacci number generator in ANSI C using recursion
#include <stdio.h>
#include <time.h>

#define COUNT 30

long Fibo (long x);

int main (int argc, const char * argv[]) {

    long fibo;
    int i;
    clock_t start, done;

    start = clock();

    printf("Lasketaan fibo %d \n", COUNT);

    for (i = 1; i <= COUNT; i++) {
        fibo = Fibo (i);
        printf ("Fibo: %d - %ld\n",i, fibo);
    }

    done = clock();
    printf("Laskenta kesti: %f sec\n",(done-start)/(double)(CLOCKS_PER_SEC));

    return 0;
}

long Fibo (long x) {
    if (x < 3)
        return 1;
    else
        return Fibo (x-1) + Fibo (x-2);
}