Python实现四则运算练习系统

主要知识点：

1）函数

一、菜单函数：

程序流程图：

菜单显示代码： 

#显示菜单
def Menu():
    print("1 加法运算")
    print("2 减法运算")
    print("3 乘法运算")
    print("4 除法运算")
    print("0 退出")
    choice = int(input("请输入->"))
    return choice

二、实现加法程序

流程图：

代码：

def Add():
    for each in range(1,M+1):
        a = int(random.randint(1,101))
        b = int(random.randint(1,101))
        ret = a + b
        print(each,'->',a,"+",b,"=",end="")
        ans = int(input())
        if ans == int(ret):
            print("回答正确")
        else:
            print("回答错误,正确答案是->",ret)

完整程序流程图：

完整代码：

#小学生四则运算练习系统

import random   #随机数模块
M = 10

#显示菜单
def Menu():
    print("1 加法运算")
    print("2 减法运算")
    print("3 乘法运算")
    print("4 除法运算")
    print("0 退出")
    choice = int(input("请输入->"))
    return choice

#加法练习
def Add():
    for each in range(1,M+1):
        a = int(random.randint(1,101))
        b = int(random.randint(1,101))
        ret = a + b
        print(each,'->',a,"+",b,"=",end="")
        ans = int(input())
        if ans == int(ret):
            print("回答正确")
        else:
            print("回答错误,正确答案是->",ret)

#减法练习
def Minus():
    for each in range(1,M+1):
        a = int(random.randint(1,101))
        b = int(random.randint(1,101))
        if a >= b:
            print(each,'->',a,"-",b,"=",end="")
            ret = a - b
        else:
            print(each,'->',b,"-",a,"=",end="")
            ret = b - a
        ans = int(input())
        if ans == int(ret):
            print("回答正确")
        else:
            print("回答错误,正确答案是->",ret)


#乘法练习
def Multip():
    for each in range(1,M+1):
        a = int(random.randint(1,99))
        b = int(random.randint(1,99))
        ret = a * b
        print(each,'->',a,"✖",b,"=",end="")
        ans = int(input())
        if ans == int(ret):
            print("回答正确")
        else:
            print("回答错误,正确答案是->",ret)

#除法练习
def Div():
    for each in range(1,M+1):
        a = int(random.randint(1,99))
        b = int(random.randint(1,99))
        ret = (a * b )/ b
        print(each,'->',a*b,"÷️",b,"=",end="")
        ans = int(input())
        if ans == int(ret):
            print("回答正确")
        else:
            print("回答错误,正确答案是->",int(ret))
#主函数实现循环
while 1:
    choice = Menu()
    if choice == 1:
        Add()
    elif choice == 2:
        Minus()
    elif choice == 3:
        Multip()
    elif choice == 4:
        Div()
    elif choice == 0:
        break
    else:
        print("输入无效")

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