本程序要自己创建个文本格式的输入文件a1.txt,编译后能将文本文件前255字节以内的字符转换成相应的AscII码值的二进制表示,并存入输出文件a2.txt中。然后再将二进制文件还原并存入a3.txt文件。
具体代码如下:
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#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;
}
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原文链接:https://blog.csdn.net/C_address/article/details/49767545