Category : Files from Magazines
Archive   : VOL11N14.ZIP
Filename : CNVRTCPP.CPP

 
Output of file : CNVRTCPP.CPP contained in archive : VOL11N14.ZIP
// cnvtcpp.cpp RHS 12/25/91

#include
#include
#include
#include
#include

char *binarystrs[8] = { "000", "001", "010", "011",
"100", "101", "110", "111" };

char *oct2bin(char *octstr, char *binstr)
{
char *temp = binstr;

for( *binstr = ' '; *octstr; octstr++)
{
strcpy(binstr,binarystrs[(*octstr)-'0']);
binstr += 3;
}
for(binstr = temp; *binstr == '0'; binstr++);
strcpy(temp,binstr);
return temp;
}

unsigned long bin2dec(char *binstr)
{
unsigned long result = 0L;

for( ; *binstr; binstr++)
result = (result*2) + (*binstr-'0');
return result;
}

typedef struct _convert
{
char type;
char *fmtstr;
} Convert;

Convert CnvtTable[3] =
{
{ 'o',"%lo", },
{ 'd',"%lu", },
{ 'h',"%lx", }
};

void main(int argc, char **argv)
{
if(argc != 2)
{
usage:
cout << "Usage: CONVERT [r]\n"
"\twhere n >= 0 and n >= 4294967295 and 'r' is the radix (b,o,h,d)\n"
"\texamples: 10b Ah 3d 4o (binary 10, A hex, 3 decimal, 4 binary\n"
"\t(numbers without a radix are assumed to be decimal)\n";
exit(0);
}

char *number = argv[1];
char radix = '\0';

radix = '\0';
radix = number[strlen(number)-1];

if(!isalpha(radix))
radix = 'd';
else
number[strlen(number)-1] = '\0';

unsigned long result;

switch(tolower(radix))
{
case 'b':
result = bin2dec(number);
break;

case 'o':
case 'h':
case 'd':
int i;
for(i = 0; i < 3; i++)

if(radix == CnvtTable[i].type)
{
sscanf(number,CnvtTable[i].fmtstr,&result);
break;
}
break;

default:
goto usage;
}

char octstr[15], binstr[40];
sprintf(octstr,"%lo",result);
char *equal_sep = " = ";

cout << oct2bin(octstr,binstr) << 'b' << equal_sep;
cout << oct << result << 'o' << equal_sep;
cout << dec << result << 'd' << equal_sep;
cout << hex << result << 'h';
cout << '\n';
}















  3 Responses to “Category : Files from Magazines
Archive   : VOL11N14.ZIP
Filename : CNVRTCPP.CPP
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/