Solved

stream input/output:  output decimal to binary on the screen

Posted on 2004-03-23
4
239 Views
Last Modified: 2011-09-20
Hi,

I have a simple assignment where I have to convert 5 digits from an int array 'a'  to binary, oct,  dec, and  hex.
The oct, dec, hex are no problem, but I cannot figure out how to convert the decimal values to binary.  I know there is a simple way to do this without writing an algorithm, but I'm at a loss.  Besides, I'm not SUPPOSED to write an algorithm.
tried ios::binary too, but no luck.

code snippet of my output from the array is below followed by how its supposes to look
BTW: width8 is self-defined stream manipulator I wrote to format output to 8 spaces wide:

 for ( int i = 0; i < size; i++ ){
       cout << width8 <<  -->>binary convertion here? <--  << a[i];  //binary
                                                                                                
       cout << width8 << showbase << oct << a[i] << noshowbase;  //oct
       cout << width8 << dec << a[i];                                              //dec
       cout << width8 << uppercase << hex << a[i];                        //hex
       cout << endl;
       }
 cout << endl;



Table with the numbers in various bases
bin        oct      dec     hex
1010      012      10      A
10100    024      20      14
11110    036      30      1E
101000  050      40      28
110010  062      50      32
 
0
Comment
Question by:r3r
  • 2
4 Comments
 
LVL 10

Accepted Solution

by:
Sys_Prog earned 500 total points
ID: 10664225
0
 
LVL 10

Expert Comment

by:Sys_Prog
ID: 10664232
0
 

Author Comment

by:r3r
ID: 10664694
thanks all.  i appreciate it.
R
0
 
LVL 17

Expert Comment

by:rstaveley
ID: 10666072
The standard library also has bitset, which is nice for binary numbers, if you are OK with leading zeros:
--------8<--------
#include <iostream>
#include <iomanip>
#include <bitset>
#include <vector>

int main()
{
        const int size = 5;
        std::vector<int> a(size);
        for (int i = 0;i < size;++i)
                a[i] = 10*(i+1);
        for (int i = 0;i < size;++i)
                std::cout
                        << std::setw(8) << std::bitset<6>(a[i]) /* Six bit bitset */
                        << std::setw(8) << std::oct << std::showbase << a[i]
                        << std::setw(8) << std::hex << std::showbase << a[i]
                        << std::setw(8) << std::dec << std::showbase << a[i]
                        << '\n';
}
--------8<--------
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: SunnyDark
This article's goal is to present you with an easy to use XML wrapper for C++ and also present some interesting techniques that you might use with MS C++. The reason I built this class is to ease the pain of using XML files with C++, since there is…
Written by John Humphreys C++ Threading and the POSIX Library This article will cover the basic information that you need to know in order to make use of the POSIX threading library available for C and C++ on UNIX and most Linux systems.   [s…
The goal of the tutorial is to teach the user how to use functions in C++. The video will cover how to define functions, how to call functions and how to create functions prototypes. Microsoft Visual C++ 2010 Express will be used as a text editor an…
The viewer will be introduced to the technique of using vectors in C++. The video will cover how to define a vector, store values in the vector and retrieve data from the values stored in the vector.

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question