nepcmain.c

是一个小计算器的例子

#include <stdio.h>

#include "y.tab.c"
extern int yyparse();
extern FILE * yyin;

void motd()
{
    printf("--------------------------------------------------------------\n");
    printf(">> nepc-0.2-r2 - A mini limited precision interpreting calculator.\n");
    printf(">> Copyright (C) 2005 [e-mail]\n");
    printf(">> nepc is open software; you can redistribute it and/or modify\n\
   it under the terms of the version 2.1 of the GNU Lesser \n\
   General Public License as published by the Free Software\n\
   Foundation.\n>> Type 'exit' to quit, type 'help' to get help.\n");
    printf("--------------------------------------------------------------\n");
}

int main(void) 
{
    motd();
    yyin=stdin; /* set parse stream to standard input */
    yyparse(); /* begin parse */
    fclose(yyin);
    return 0;
}