程序代码：

            int i,a=0,b=1,fnum=23;//fnum为第几项
            for (i = 0; i < fnum; i++)
            {
                b = a + b;
                a = b - a;
            }
            b就是结果了

程序代码：

#include <stdio.h>
void main()
{
   int i=0,a=0,b=1,fnum=22; /*fnum为第几项,22是int最大范围了*/
   for (;i<=fnum;b+=a,a=b-a) printf("f(%d)=%d\n",i++,b);
   getch();
}