#include <iostream>
using std::cout;
using std::endl;
// функция преобразует четыре бита в их строковое представление
void
numToBin( char num, char *res )
{
switch( num )
{
case 0x0:
strcat( res, "0000" );break;
case 0x01:
strcat( res, "0001" );break;
case 0x02:
strcat( res, "0010" );break;
case 0x03:
strcat( res, "0011" );break;
case 0x04:
strcat( res, "0100" );break;
case 0x05:
strcat( res, "0101" );break;
case 0x06:
strcat( res, "0110" );break;
case 0x07:
strcat( res, "0111" );break;
case 0x08:
strcat( res, "1000" );break;
case 0x09:
strcat( res, "1001" );break;
case 0x0A:
strcat( res, "1010" );break;
case 0x0B:
strcat( res, "1011" );break;
case 0x0C:
strcat( res, "1100" );break;
case 0x0D:
strcat( res, "1101" );break;
case 0x0E:
strcat( res, "1110" );break;
case 0x0F:
strcat( res, "1111" );break;
}
}
// функция получает из числа его двоичное представление
void
getBinary( void * value, size_t valueSize, char * result, size_t resultSize )
{
if ( resultSize < valueSize * 8 + 1 ) {
return;
}
char *revers = new char[valueSize];
if ( NULL == revers ) {
return;
}
char *ptr = (char*)value;
for ( int i = valueSize-1; i >= 0; --i ) {
revers[i] = *ptr;
ptr++;
}
for ( size_t i = 0, j = 0; i < valueSize; ++i, j+=4 ) {
numToBin( (revers[i]>>4)&0x0F, result+j );
numToBin( revers[i]&0x0F, result+j );
}
delete revers;
revers = NULL;
}
int
main( )
{
float d = 100;
char res[100] = { 0 };
getBinary( &d, sizeof d, res, sizeof res );
cout << res << endl;
return (EXIT_SUCCESS);
} |
