《python语言程序设计》_第一章编程题

题目1.1 ：显示"welcome to python "

答案：print('welcome to python')

题目1.2：显示"welcome to python " 五次

答案：print ("welcome to python ") * 5  # 表示换行，要是没有 的话就会连接在一起

题目1.3:编写fun，其中fun是分别有fun组成。

答案：#注意，"N"，"N"和”NN"长度不一致

print ("F"*7," "*3,"U"," "*5,"U"," "*3,"N"*2," "*4,"N"*2)
print ("F"*2," "*4," "*3,"U"," "*5,"U"," "*3,"N"*3," "*3,"N"*2)
print ("F"*7," "*3,"U"," "*5,"U"," "*3,"N"*2,"","N"*1," "*1,"N"*2)
print ("F"*2," "*4," "*3,"","U"," "*3,"U"," "*4,"N"*2," "*2,"N","N"*2)
print ("F"*2," "*4," "*5,""*3,"U"*3," "*2," "*3,"N"*2," "*3,"N"*3)

 题目1.4：编写程序显示下面的表格（类似矩阵）

答案：#二位数和两位数的长度不一样，要根据数据的长度调整空格的长度

value= [1,2,3,4]
print ("a", " "*2, "a^2"," "*2,"a^3"," "*4,)
print ("1", " "*2, "1"," "*5,"1"," "*4)
print ("3", " "*2, "9"," "*5,"27"," "*4)
print ("4", " "*2, "16"," "*4,"64"," "*4)

题目：1.5编写程序显示下面表达式的结果：（9.5*4.5-2.5*3）/（45.5-3.5）

答案：print((9.5*4.5-2.5*3)/(45.5-3.5))

要是加上双引号，即：

print("(9.5*4.5-2.5*3)/(45.5-3.5)")

那显示的是这个公式（9.5*4.5-2.5*3）/（45.5-3.5）

题目1.6 ：级数求和，编写程序显示1+2+3+4+5+6+7+8+9的和

答案：  #for之后那一列（可能是几列）要缩进

sum = 0   

for i in range(10) 

  sum+=i 

print ( sum) 

题目1.7 ：（近似Π）可以使用下面的公式计算Π=4*（1-1/3+1/5-1/7+1/9-1/11+...），编写程序显示4*（1-1/3+1/5-1/7+1/9-1/11）和4*（1-1/3+1/5-1/7+1/9-1/11+1/13-1/15）

答案：#**表示次方

程序1：

pi = 0.0
for i in range(1,6):
pi += 4*(((-1)**(i+1))/(2*i-1))
print (pi)

程序2：

pi = 0.0
for i in range(1,8):
pi += 4*(((-1)**(i+1))/(2*i-1)) 
print (pi)

 1.8

显示r=5.5的圆的面积和周长。

1.9；1.10；1.11不会

1.12

程序：#求更加简单的分享

import turtle
turtle.forward(100)

turtle.right(90)
turtle.forward(100)

turtle.right(90)
turtle.forward(200)

turtle.right(90)
turtle.forward(200)

turtle.right(90)
turtle.forward(200)

turtle.right(90)
turtle.forward(100)

turtle.right(90)
turtle.forward(200)

turtle.left(90)
turtle.forward(100)

turtle.left(90)
turtle.forward(100)

turtle.left(90)
turtle.forward(200)

turtle.left(180)
turtle.forward(100)

 

程序2：

import turtle
turtle.penup()
turtle.goto(-50,0)
turtle.pendown()
turtle.forward(100)
turtle.penup()
turtle.goto(0,50)
turtle.right(90)
turtle.pendown()
turtle.forward(100)

程序3：#注意转折处的角度

import turtle
turtle.right(60)
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
turtle.right(120)
turtle.forward(100)

 

程序4：

import turtle
turtle.right(60)
turtle.forward(100)
turtle.right(120)
turtle.forward(100)
turtle.right(120)
turtle.forward(200)
turtle.left(120)
turtle.forward(100)
turtle.left(120)
turtle.forward(100)

 好无聊，改天再画