/*		  ASCTAB2.CPP	*/

#include <iostream.h>
#include <iomanip.h>
#include <string.h>

char* binary(int);						//prototype for binary() [below]

main()
{    int c, C;
	  char left[9], right[9];
	  cout << "\tASCII TABLE: Character, Decimal, Binary, Octal, Hex\n\n";
	  cout << "Char  Dec Binary    Oct  Hex\tChar  Dec Binary    Oct  Hex\n";
	  for(c = 32; c <= 79; c++)
	  {    C = c + 48; 					//c for left set of columns
												//C for right set
			 strcpy(left, binary(c));	//string of bits set up corresponding to c
			 strcpy(right, binary(C));	//same for C

			 cout << setw(3)				//character version of c
					<< (char) c				//cast it
					<< dec					//back to decimal from previous time
					<< setw(6)				//through loop
					<< c
					<< setw(9)				//provide for extra space to left
					<< left					//equivalent bits
					<< oct					//setup for octal version
					<<	setw(5)
					<< c
					<< hex					//setup for hex version
					<< setw(5)
					<< c
					<< '\t'					//tab over to second column
					<< setw(3)				//for character version, as in left column
					<< (char) C				//print after casting
					<< dec					//next the decimal version
					<< setw(6)
					<< C
					<< setw(9)
					<< right  				//equivalent bits
					<< oct					//setup for octal
					<< setw(5)
					<< C
					<< hex					//setup for hex
					<< setw(5)
					<< C
					<< endl;
	  }
	  return 0;
}

//   BINARY.CPP	CONVERTS INTEGER ARGUMENT N TO A STRING OF 0s AND 1s

char* binary(int n)
{
	  static char bin[9];		 // holds 0s or 1s
	  for(int i=0; i<8; i++)
			 bin[i] = '0';  	   // all 0s to begin with

//	FILL IN BINARY STRING FROM THE LEAST SIGNIFICANT BIT (=LSB)
	  i = 7;
	  while(n)						// when n becomes 0, stop
	  {    if( n % 2 )    		// if remainder = 1 (not 0 [false])
					bin[i] = '1';  // 1 goes into string--stays 0 otherwise
			 n >>= 1;        		// next n
			 i--;						// go left in the string
	  }
	  return bin;
}