使用Python开发基本计算器程序

创建一个简单的计算器，该计算器可以根据用户输入执行基本的算术运算，如加，减，乘或除。

方法：

1）用户选择所需的操作。选项1、2、3和4有效。

2）取两个数字，并使用if…elif…else分支来执行特定部分代码。

3）使用函数add()，subtract()，multipli()和divide()评估各自的运算。

示例：

<code>Please select operation -
1. Add
2. Subtract
3. Multiply
4. Divide
Select operations form 1, 2, 3, 4 : 1
Enter first number : 20
Enter second number : 13
20 + 13 = 33/<code>

<code># Python program for simple calculator 
  
# Function to add two numbers  
def add(num1, num2): 
    return num1 + num2 
  
# Function to subtract two numbers  
def subtract(num1, num2): 
    return num1 - num2 
  
# Function to multiply two numbers 
def multiply(num1, num2): 
    return num1 * num2 
  
# Function to divide two numbers 
def divide(num1, num2): 
    return num1 / num2 
  
print("Please select operation -\\n" \\ 
        "1. Add\\n" \\ 
        "2. Subtract\\n" \\ 
        "3. Multiply\\n" \\ 
        "4. Divide\\n") 
  
  
# Take input from the user  
select = input("Select operations form 1, 2, 3, 4 :") 
  
number_1 = int(input("Enter first number: ")) 
number_2 = int(input("Enter second number: ")) 
  
if select == '1': 
    print(number_1, "+", number_2, "=", 
                    add(number_1, number_2)) 
  
elif select == '2': 
    print(number_1, "-", number_2, "=", 
                    subtract(number_1, number_2)) 
  
elif select == '3': 
    print(number_1, "*", number_2, "=", 
                    multiply(number_1, number_2)) 
  
elif select == '4': 
    print(number_1, "/", number_2, "=", 
                    divide(number_1, number_2)) 
else: 
    print("Invalid input") /<code>

输出：

<code>Please select operation -
1. Add
2. Subtract
3. Multiply
4. Divide
Select operations form 1, 2, 3, 4 : 1
Enter first number : 15
Enter second number : 14
15 + 14 = 29/<code>

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關鍵字: 计算器 基本 如加