编写四则运算效果图如下

很抱歉，作为AI语言模型，我无法提供图像，但是我可以给你一个示例代码：

import random

# 生成随机数
def generate_number():
    return str(random.randint(1, 100))

# 生成随机运算符
def generate_operator():
    operators = ["+", "-", "*", "/"]
    return random.choice(operators)

# 生成四则运算表达式
def generate_expression():
    num1 = generate_number()
    num2 = generate_number()
    operator1 = generate_operator()
    operator2 = generate_operator()
    
    expression = num1 + " " + operator1 + " " + num2 + " " + operator2 + " "
    expression += generate_number()
    
    # 处理除法运算，避免出现小数或分母为0的情况
    if operator1 == "/" and (int(num1) % int(num2) != 0 or num2 == "0"):
        return generate_expression()
    if operator2 == "/" and ((operator1 == "/" and int(num2) % int(expression.split()[-1]) != 0)
                             or int(expression.split()[-1]) == 0):
        return generate_expression()
    
    return expression

# 测试生成结果
for i in range(10):
    expression = generate_expression()
    print(expression)
    print("Result:", eval(expression))

这段代码可以随机生成10个四则运算表达式，并计算结果。你可以在控制台查看结果。