Fputc binary to ascii in C programming

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hi friends
i have a file in c langage , this file contatins binary byte it means only 0 and one !
i want to collect every 8 bytes to ASCII and save in another file !
thank you

What I have tried:

C++

bit_files *tmp;
tmp = (bit_files *)malloc(sizeof(bit_files));
char a;
FILE *first_file,*final_file;
first_file=fopen("file1","r");
final_file=fopen("file2","w");
		
            tmp->bitBuffer <<= 1;
            tmp->bitCount = 0;
			
while (a=fgetc(first_file)!=EOF)
{
	if (a==0)
	{
	tmp->bitBuffer=tmp->bitBuffer<<=1;
	}
	else
	{
		tmp->bitBuffer=tmp->bitBuffer|=1;
	}
	tmp->bitCount++;
	if (tmp->bitCount==8)
	{
		fputc(tmp->bitBuffer,final_file);
		tmp->bitBuffer=0;
		tmp->bitCount=0;
	}
}
fclose(first_file);
fclose(final_file);

Posted 14-Aug-16 23:29pm

yagami_md

Updated 15-Aug-16 23:44pm

Patrice T

v3

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Patrice T 15-Aug-16 6:58am

Show an example of your "binary file"
Use Improve question to update your question.

2 solutions

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OriginalGriff · Accepted Answer · 2016-08-14T23:43:00

A "binary file" doesn't contain just zero and 1, it contains binary data - which are unsigned char values each containing between 0 and 255 inclusive. If your data truly is the binary values 0 and 1 only per byte, then all you need to do is loop through collecting each eight bits in an unsigned char by using the << operator to move each bit up into place and then write each assembled byte to your output when it's finished.

But I'd start by looking at your binary file with a hex editor to make sure you aren't just misthinking the whole app!

Richard MacCutchan · Accepted Answer · 2016-08-15T00:38:00

Solution 2

A simpler way would be to read eight bytes at a time and assemble the ascii from the low order bits, something like:

C++

char			inputBuffer[8];
char			temp;
FILE*			binin;
int				i;

binin = fopen("ctest.txt", "rb");
if (binin == NULL)
    exit(1);
do
{
    int nIn = fread(inputBuffer, sizeof(char), sizeof inputBuffer, binin);
    if (nIn < sizeof inputBuffer)
    break;
    temp = 0;
    for (i = 0; i < 8; ++i)
    {
        temp |= (inputBuffer[i] & 1) << (7 - i);
    }
    printf("%c", temp);
} while(1);
printf("\n");

Posted 15-Aug-16 0:38am

Richard MacCutchan

Updated 15-Aug-16 23:30pm

v2

Comments

yagami_md 16-Aug-16 5:01am

my program on visual studio 2010 , c langage

Richard MacCutchan 16-Aug-16 5:31am

I have modified the code to use pure C; please try it now.

yagami_md 16-Aug-16 5:37am

thank you very much , all its well
thank you brother , you are good programmer thank you for your help

Richard MacCutchan 16-Aug-16 5:56am

Happy to help. Not good, but I have been doing it for a long time.