输入n,输出费波那契数列 1~n 项Input a number n and then output Fibonacci numbers the first to the nth Fibonacci_number2:输入 n ，输出第 n 项Input n and then output the nth number -Input a number n and then output Fibonacci numbers the first to the nth

题目：有一分数序列：2/1，3/2，5/3，8/5，13/8，21/13...求出这个数列的前20项之和-Title: There is a sequence of scores: 2/1, 3/2, 5/3, 8/5, 13/821/13 ... find this series the sum of the first 20

做一个梯形的数列运算，下一行包含上一行的内容，利用两个循环完成这件事情-4. Write a program to print a table as follows:1*1= 12*1= 2 2*2= 43*1= 3 3*2= 6 3*3= 9….9*1= 9 9*2=18 9*3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81

猜数字游戏：已知某个数列中的2个数字，用户猜第三个数字，以用户猜测次数和猜中次数作为评价标准-Number guessing game: given a series of two numbers, the user guess the third number, customer number and guess the number of guesses as uation criteria