Fibanocci c programlama ornek

#include <stdio.h>
int fibanocci(int n)
{
int a, b, c, top;
a=1; b=1; c=0; top=1;
do
{
top+=b;
c=a+b;
a=b;
b=c;
} while (b<=n);
printf("toplam=%d ", top);
}
main()
{
int nn=15;
/* printf("son sayiyi gir :");
scanf("%d", &nn);*/
fibanocci(nn);
getch();

}