op-1.c

霍夫曼编码压缩演算法

#include<stdio.h>
#define BUFFER_SIZE 102400
#define TRUE 1
typedef unsigned char byte;
unsigned char buffer[BUFFER_SIZE];
int encode(FILE *fp,byte *img,int mx);
/* mainㄧ? */
int main(int ac,char *av[])
{
  FILE *fp_i,*fp_o;
  int i,c;
  if (ac<3) {
    exit(8);
  }
  fp_i=fopen(av[1],"rb");
  if (fp_i==NULL)
  {
    fprintf(stderr,"Input File cannot open\n");
    exit(8);
  }
  i=0;
  while (i<BUFFER_SIZE && (c=fgetc(fp_i))!=EOF)
  {
    buffer[i]=c;
    i++;
  }
  fclose(fp_i);
  fp_o=fopen(av[2],"wb");
  if (fp_o==NULL)
  {
    fprintf(stderr,"Output File cannot open\n");
    exit(8);
  }
  encode(fp_o,buffer,i);
  fclose(fp_o);
  return(0);
}

/* ―