Infix To Postfix in C+++

 A program that will convert the given infix expression into postix experession using C++ programming language.

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Program Listing

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

using namespace std;

int precedence(char op) {
    if (op == '+' || op == '-')
        return 1;
    if (op == '*' || op == '/')
        return 2;
    return 0;
}

string infixToPostfix(string infix) {
    stack<char> s;
    string postfix = "";

    for (char& c : infix) {
        if (isalnum(c))
            postfix += c;
        else if (c == '(')
            s.push(c);
        else if (c == ')') {
            while (!s.empty() && s.top() != '(') {
                postfix += s.top();
                s.pop();
            }
            s.pop();  // pop the '('
        } else {
            while (!s.empty() && precedence(c) <= precedence

(s.top())) {
                postfix += s.top();
                s.pop();
            }
            s.push(c);
        }
    }

    while (!s.empty()) {
        postfix += s.top();
        s.pop();
    }

    return postfix;
}

int main() {
    string infix;
    
    
    cout <<"\n\n";
    cout <<"\tInfix To Postfix in C++\n\n";
    
    cout << "\tEnter an infix expression: ";
    getline(cin, infix);

    string postfix = infixToPostfix(infix);
    
    cout <<"\n\n";
    cout << "\tThe corresponding postfix expression is: " << 

postfix << endl;

    return 0;
}