/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	}
}

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# ماشین حساب ساده با Python

def add(x, y):
    return x + y

def subtract(x, y):
    return x - y

def multiply(x, y):
    return x * y

def divide(x, y):
    if y == 0:
        return "خطا: تقسیم بر صفر ممکن نیست!"
    else:
        return x / y

print("ماشین حساب ساده")
print("عملیات‌ها:")
print("1. جمع")
print("2. تفریق")
print("3. ضرب")
print("4. تقسیم")

choice = input("عدد عملیات مورد نظر را وارد کنید (1/2/3/4): ")

num1 = float(input("عدد اول را وارد کنید: "))
num2 = float(input("عدد دوم را وارد کنید: "))

if choice == '1':
    print("نتیجه:", add(num1, num2))
elif choice == '2':
    print("نتیجه:", subtract(num1, num2))
elif choice == '3':
    print("نتیجه:", multiply(num1, num2))
elif choice == '4':
    print("نتیجه:", divide(num1, num2))
else:
    print("انتخاب نامعتبر است!")