在C++中打印后缀表达式字符串中的各个操作

#include <iostream>
#include <stack>
#include <string>

using namespace std;

int evaluatePostfixExpression(string postfixExpression) {
    stack<int> operandStack;

    for (char c : postfixExpression) {
        if (isdigit(c)) {
            operandStack.push(c - '0');
        } else if (c == '+' || c == '-' || c == '*' || c == '/') {
            int operand2 = operandStack.top();
            operandStack.pop();
            int operand1 = operandStack.top();
            operandStack.pop();

            int result;
            switch (c) {
                case '+':
                    result = operand1 + operand2;
                    break;
                case '-':
                    result = operand1 - operand2;
                    break;
                case '*':
                    result = operand1 * operand2;
                    break;
                case '/':
                    result = operand1 / operand2;
                    break;
            }

            operandStack.push(result);
        }
    }

    return operandStack.top();
}

int main() {
    string postfixExpression = "34+2*";
    int result = evaluatePostfixExpression(postfixExpression);
    cout << "Result: " << result << endl;

    return 0;
}