Re: unsigned char ---- a special type of integer

From:
"BobR" <removeBadBobR@worldnet.att.net>
Newsgroups:
comp.lang.c++
Date:
Fri, 03 Aug 2007 23:49:42 GMT
Message-ID:
<qaPsi.395331$p47.67588@bgtnsc04-news.ops.worldnet.att.net>
Zahid Faizal <zahidfaizal@canada.com> wrote in message...

All this time I mindlessly thought that unsigned char is just like
other unsigned members of the integer family (integer, short, long,
long long) with a more constrained range of values ---- from 0 to
255.

[snip]

////////////////////////
#include <iostream>
using namespace std;

int main(){
  unsigned char first;
  unsigned short second;
  unsigned int firstInt, secondInt;
  cout << "\nEnter first value: ";
  cin >> first;
  firstInt = first;
  cout << "\nEnter second value: ";
  cin >> second;
  secondInt = second;
  cout << "Your values are " << firstInt << " and " << secondInt <<
endl;
}
////////////////////////
I entered 0 and 0 and the output was as follows:
Your values are 48 and 0


{ // main() or ? // C++
typedef unsigned char Uchar;
for( std::size_t a(0); a < UCHAR_MAX; ++a ){
     if( std::isprint( a ) ){ // <cctype>
          std::cout<<"int="<<int(a)
               <<" hex="<<std::hex<<int(a)<<std::dec
               <<" char="<<Uchar(a);
          if( (a >= '0') && (a <= '9') ){
               std::cout<<" int cnv="<<int( a & 0xF );
               }
          std::cout<<std::endl;
          } // if()
     } // for(a)
}

Look through the output for "48" in the first column.

--
Bob R
POVrookie

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