#includeint f(int n) { if(n == 1 || n == 2) { return 1; } else { return f(n-1) + f(n-2) }}void main() { int n; scanf("%d", &n); printf("第n项:%d", f(n));}
https://zhidao.baidu.com/question/340790004 这写法已经可以了~~~~~~