main.c

是一个不错的语法分析器,里面实现了语法分析的算法,并判断了一些优先级的控制和对栈的操作.

/************************************************************

  Title:    Operator-Precedence Parsing
  Author:   Dake Song, Class 0201 of Computer Science
  Date:     Mar.18 of 2005

**************************************************************/

#include "stdio.h"
#include "Parse.h"
#include "Global.h"

/* 
    Get string from user, and
  store the value into the global variable Buff  */
void InputString()
{
    int len = 0;
    printf("The grammar is: ");
    printf(GRAMMAR);
    printf("\nPlease input any string to parse:\n");
    scanf("%s", Buff);
    len = strlen(Buff);
    Buff[len] = '#';
    Buff[len+1] = 0;
}

void main()
{
    InputString();
    Parse();
    getch();
}