main.c

这个是一个词法和语法分析器的程序

#include <stdio.h>

extern int yydebug;
extern FILE *yyin, *yyout;

extern int MVL_LINNUM;


main(argc, argv)
int argc;
char** argv;
{
  char* infilename;

  /* missing parameter check */
    
  /* yydebug=1; */


  /* open files */
  /* input file */
  if (argc>1){
    infilename=(char*)malloc(sizeof(char)*strlen(argv[1])+1);
    strcpy(infilename, argv[1]);
    if ((yyin=fopen(argv[1],"r"))==NULL){
      yyerror("unable to open inputfile");
    }    
    argc--;
    argv++;
  }else{
    infilename=" ";
  }
  /* output file */
  if (argc>1){
    if ((yyout=fopen(argv[1],"w"))==NULL){
      yyerror("could not open outputfile\n");
    }
  }

  yyparse();


  exit(0);

}