прог

#include "stdafx.h"
#include<iostream>
#include<string>
#include<map>
#include<cctype>
#include<sstream>



int main()
{
	setlocale(0, "Russian");
	using namespace std;
	enum Token_value
	{
		NAME, NUMBER, END,
		PLUS = '+', MINUS = '-', MUL = '*', DIV = '/',
		PRINT = ';', ASSIGN = '=', LP = '(', RP = ')'
	};
	Token_value curr_tok = PRINT;


	double number_value;
	string string_value;
	{
		Token_value get_token();
		{
			char ch;
				do {
					if (!cin.get(ch)) return curr_tok = END;
				} while (ch != '\n' && isspace(ch));
				switch (ch) {
				case ';':
				case '\n':
					return curr_tok = PRINT;
				case '*':
				case '/':
				case '+':
				case '-':
				case '(':
				case ')':
				case '=':
					return curr_tok = Token_value(ch);
				case '0': case '1': case '2': case '3': case '4':
				case '5': case '6': case '7': case '8': case '9':
				case '.':
					cin.putback(ch);
					cin >> number_value;
					return curr_tok = NUMBER;
				default:
					if (isalnum(ch))
					{
						string_value = ch;
						while (cin.get(ch) && isalnum(ch));
						string_value.push_back(ch);
						cin.putback(ch);
						return curr_tok = NAME;
					}
					cout << ("Использована недопустимая лексема \n");
					return curr_tok = PRINT;
				}
			}
		}

	return 0;
}