「✨」 feat: finished ex01

ex01/RPN.cpp

@@ -0,0 +1,77 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   RPN.cpp                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: adjoly <adjoly@student.42angouleme.fr>     +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/06/03 12:07:59 by adjoly            #+#    #+#             */
+/*   Updated: 2025/06/03 15:56:22 by adjoly           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <RPN.hpp>
+#include <cctype>
+#include <exception>
+#include <sstream>
+#include <stack>
+#include <stdexcept>
+
+int add(int first, int second) { return first + second; }
+int subst(int first, int second) { return first + second; }
+int mult(int first, int second) { return first * second; }
+int div(int first, int second) {
+	if (second == 0)
+		throw std::invalid_argument("can't divide by 0 sorry D:");
+	return first / second;
+}
+
+void calc(int calc(int, int), std::string::const_iterator ,
+		  std::stack<int> &stack) {
+	int first, second;
+
+	if (stack.size() != 2)
+		throw std::range_error("need 2 at least two number");
+	second = stack.top();
+	stack.pop();
+	first = stack.top();
+	stack.pop();
+	if (stack.size() != 0)
+		throw std::range_error("too much number");
+	stack.push(calc(first, second));
+	// if (*(c + 1) != ' ' || *(c + 1) != '\0')
+	// 	throw std::invalid_argument("");
+}
+
+void handle(std::string::const_iterator c, std::stack<int> &stack) {
+	if (*c == ' ')
+		return;
+	else if (std::isdigit(*c))
+		stack.push(*c - '0');
+	else if (*c == '+')
+		calc(add, c, stack);
+	else if (*c == '-')
+		calc(subst, c, stack);
+	else if (*c == '*')
+		calc(mult, c, stack);
+	else if (*c == '/')
+		calc(div, c, stack);
+	else
+		throw std::invalid_argument("invalid caracter detected");
+}
+
+void rpn(char *av) {
+	std::string		str(av);
+	std::stack<int> stack;
+
+	for (auto it = range(str)) {
+		try {
+			handle(it, stack);
+		} catch (std::exception &e) {
+			std::stringstream str;
+			str << "Error: " << e.what() << " : " << *it;
+			throw std::runtime_error(str.str());
+		}
+	}
+	std::cout << stack.top() << std::endl;
+}