readfile.c

来自「哈夫曼编码解码以及文档资料和Makefile文件。」· C语言 代码 · 共 40 行

#include "head.h"
#include "struct.h"
#include "declare.h"

int readfile(char *filename,CharArr *ch)
{
	FILE *fp;
	int i=0,j;
	char c;
	ElemType e={'\0',0,};
	
	fp=fopen(filename,"rt");
	if(fp==NULL)
	{
		fprintf(stderr,"open file fail:%s",strerror(errno));
		return -1;
	}
	while(!feof(fp))
	{
		ch->e[(int)(c=fgetc(fp))].w++;
		//printf("%c",c);
	}
	fclose(fp);
	for(j=0,i=0;i<128;i++)
	{
		if(ch->e[i].w!=0)
		{
			ch->e[j].c=(char)i;
			ch->e[j].w=ch->e[i].w;
			ch->size+=1;		
			j++;
		}
	}
printf("size=%d\n",ch->size);
	for(;j<MAXSIZE;j++)
		ch->e[j]=e;
	return  0;
}