/*
Expression parser

C++ code, project developed with wxDev-C++

Author: Jos de Jong, 2007
*/

// declarations
#include <cstdlib>
#include <cstdio>

#include "parser.h"


using namespace std;

int main(int argc, char *argv[])
{
    char expr[255];
    char err[255];
    double res = 0;

    // create a parser object
    Parser prs;

    puts("Enter an expression an press Enter to calculate the result.");
    puts("Enter an empty expression to quit.");
    puts("");

    do
    {
        // request an expression
        printf("> ");
        gets(expr);
        
        if (strcmp(expr, "") != 0)
        {
            try
            {
                // evaluate the expression
                char* result;
                result = prs.parse(expr);
                printf("\t%s\n", result);
            }
            catch (...)
            {
                printf("\tError: Unknown error occured in parser\n");
            }
        }
    } while (strcmp(expr, "") != 0);
    
    return EXIT_SUCCESS;
}