青蛙跳台阶.c

#define _CRT_SECURE_NO_WARNINGS 1 
#include<stdio.h>
#define N 6
int main()
{
  int arr[N] = { 0 };
  arr[0] = 1;
  arr[1] = 2;
  int i;

  for (i = 2; i < N; i++)
  {
    arr[i] = arr[i - 1] + arr[i - 2];
    printf("有%d级台阶时,青蛙有%d种跳法\n", i + 1, arr[i]);
  }
  return 0;
}