数据结构表达式求值代码

对于数据结构表达式求值的代码，可以使用栈来实现。以下是一个简单的示例代码：

def evaluate_expression(expression):
    stack = []
    
    for char in expression:
        if char.isdigit():
            stack.append(int(char))
        else:
            operand2 = stack.pop()
            operand1 = stack.pop()
            
            if char == '+':
                result = operand1 + operand2
            elif char == '-':
                result = operand1 - operand2
            elif char == '*':
                result = operand1 * operand2
            elif char == '/':
                result = operand1 / operand2
            
            stack.append(result)
    
    return stack.pop()

# 测试代码
expression = "(15-2)*3+4/2"
result = evaluate_expression(expression)
print("表达式的求值结果为:", result)