main.cpp

使用C++实现的Java语言子集词法、语法、语义分析器

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include "constant.h"
#include "scanner.h"

using namespace std;

int main(int argc, char * argv[])
{
    char fn_in[MAX_LINE];   //输入文件名
    char fn_out[MAX_LINE];  //输出文件名
    char fn_err[MAX_LINE];  //错误文件名
    char fn_lex[MAX_LINE];  //输出给语法分析器的文件名
    Scanner * scan;

	cout << "JavaLex by Lin Jian" << endl;
    if (argc == 1)
    {
        cout << "Input file name: ";
        cin >> fn_in;
    }
    else
    {
        strcpy(fn_in, argv[1]);
        cout << "File name: " << fn_in << endl;
    }
    strcpy(fn_out, fn_in);
    strcat(fn_out, "_out.txt");
    strcpy(fn_err, fn_in);
    strcat(fn_err, "_err.txt");
    strcpy(fn_lex, fn_in);
    strcat(fn_lex, "_lex.txt");

    scan = new Scanner(fn_in, fn_out, fn_err, fn_lex);
    if (scan->token > 0 && scan->token < TokenCount)
    {
        cout << "Scanning..." << endl;
        scan->OutputToken();
        while (scan->token > 0 && scan->token < TokenCount)
        {
            scan->NextToken();
            scan->OutputToken();
        }
        cout << "Scan is done." << endl;
        cout << "Token number: " << scan->count_file << endl;
    }
    else
    {
        cout << "File not found or that is an empty file." << endl;
    }
    delete scan;

	return 0;
}