C语言实现文本文件/二进制文件格式互换

#include <cstdio>
#include <stdio.h>
#include <string.h>
#define NSIZE 8

void print_2(int val2);
/***********文本文件转二进制**********/
void Text2Bin(const char* sIn,const char* sOut){
  char a[255];
  int count = 0;
  int ch;
  for(int j=0; j<255;j++)a[j]='\0';
  FILE* fin=fopen(sIn,"r");
  FILE* fout=fopen(sOut,"w");
  for(int i=0 ; i<=255 ; i++)fscanf(fin,"%c",&a[i]);
  for(int k=0 ; k<=254&&a[k] !='\0'; k++)
  {  
    ch = a[k];
    for(int a=7;a>=0;a--) fprintf(fout,"%d",ch>>a&1);
    //fprintf(fout,"\n");
  }
  fclose(fin);
  fclose(fout);
}
/***********二进制文件转文本文件**********/
void Bin2Text(const char* sIn,const char* sOut){
  FILE* fin=fopen(sIn,"r");
  FILE* fout=fopen(sOut,"w");
  char str[255*8];
  for(int r=0; r<255 ;r++) str[r]='\0';
  int i = 0, j = 0, iTemp = 0, flag = 0;
  int ibina[NSIZE];     
  char cRead[NSIZE];       
  char cChar;
  for(int a=0 ; a<=255 ; a++)fscanf(fin,"%c",&str[a]);
  //for(int f=0 ; f<=255 ; f++)printf("%c",str[f]);
  while(flag <= 255){
    //printf("%d",flag);
    for(int b=flag ; b>=flag && b<flag+NSIZE ; b++)
    {
      //printf("%d",b%8);
      cRead[b%8] = str[b];
      //printf("%c",cRead[b%8]);
    }
    for(i = 0; i < NSIZE; i++)
    {
      ibina[i] = (cRead[i]-'0'); 
    }
    iTemp = 1;
    cChar = 0;
    for(j = 7; j >=0 ; j--)
    {
      //printf("%c",ibina[j]);
      //printf("%d\n",cChar);
      cChar+=ibina[j]*iTemp;
      iTemp *= 2;
    }
    printf("%c",cChar);
    fprintf(fout,"%c",cChar);
    flag=flag+8;
  }
  fclose(fin);
  fclose(fout);
}

int main(){
  Text2Bin("d:\\a1.txt","d:\\a2.txt");
  Bin2Text("d:\\a2.txt","d:\\b2.txt");
  printf("\nSuccessfully converted file!\n"); 
  return 0;
}