main.cpp

一个小型C语言编译器

#include <stdio.h>
#include <stdlib.h>

#include "token.h"

extern FILE* file;
extern int fillbuf();
extern void display();

char* filename = NULL;
void main(int args, char* argv[])
{
	char* filen     = NULL;
	//FILE* fp       = NULL;
	long  filesize = 0;

	if(args < 0) {
		printf("input the file name!\r\n");
		return ;
	}

	filename = filen = argv[1];
	if (filen == NULL) {
		printf("parameter is wrong,please input the test file!\r\n");
		return ;
	}

	file = fopen(filen, "r");
	if(file == NULL) {
		printf("can't open file: %s\r\n", file);
		return ;
	}
	
    fillbuf();

    while(9){
        int l_token = 0;
        extern char* token;
        
        
        l_token = gettok();
        if(l_token == EOI){
            break;
        }
        
        if (l_token == INT && token != NULL){
            printf("%s\n", token);
            free(token);
            token = NULL;
        }
    }
    
    fclose(file);
}