Comments on: 3.7 — Converting between binary and decimal

By: zkn1729

zkn1729 — Sun, 13 Nov 2011 20:28:19 +0000

I got it. http://www.edsim51.com/sampleChapter.pdf (Page 1 and 2.)

By: zkn1729

zkn1729 — Sun, 13 Nov 2011 01:28:09 +0000

There is one thing I’m not getting here. I assume our variable is signed int x=180; It will be stored as 1011 0100. When our program calls x to print to console, how does program decide which one (180 or -76) will be printed to console? (1011 0100 = -76 and 1011 0100 = 180)

By: zingmars

zingmars — Sat, 14 May 2011 10:44:14 +0000

Wait, so the smallest negative binary number (signed) is 127, or am I missing something?

By: thevergil3

thevergil3 — Sun, 08 May 2011 20:59:08 +0000

#include
main()
{int bit=128,num;/* bitwise binary conversion*/
scanf(“%d”,&num);
while(bit>=1)
{if(num>=bit)
{printf(“1″);
num=num-bit;}
else
printf(“0″);
bit=bit/2;}
}

By: PReinie

PReinie — Wed, 20 Apr 2011 16:57:54 +0000

There are 10 kinds of people in this world…

Those who know binary, and those who don’t.

(I didn’t make this one up but it’s great!)

Phil

By: Koi

Koi — Sun, 25 Jul 2010 07:00:59 +0000

So I tried to create a program to convert a decimal number into a binary number based on your thoughts. It doesn't seem to work for some reason. Here it is:

#include 

using namespace std;

int main()
{
    cout << "Write a number to convert to binary: " << endl;
    long int nNumber;               //user's number
    cin >> nNumber;
    cout << nNumber << " is" << endl;
    int nPower(16) ;                //the power of 2 set capped at 16
    while (nPower > 0)
    {
    if (nNumber >= (2^nPower))      //checkes if the number is greater than that bit.
    {
        cout << 1 << " ";           // types 1
        nNumber -= (2^nPower);      //deletes that bit from the number
    }
    else
    {
        cout << 0 << " ";           // types 0
    }
    nPower -= 1;                    //dletes one from the power of 2 to check with.
    }
    return 0;
}

what's up with it?

By: Gio

Gio — Sat, 01 May 2010 12:43:04 +0000

For all Windows users, the default “Calculator” application can help with conversion: Change the mode to scientific, then, enter the decimal number, then hit “Bin” to convert to binary. Also works in reverse and with Hexadecimal and Octal.

By: earlmw

earlmw — Fri, 01 Jan 2010 00:23:32 +0000

two int main()s, I think you only need the second int main(). You are creating a function before before the int main() where your program begins.

By: Enrique Serrano

Enrique Serrano — Sat, 22 Aug 2009 23:18:34 +0000

This is very cool! This piece of code works like a charm! Thank you! I will se this for my gaming and simlation classes!

By: Alfreda

Alfreda — Fri, 09 Jan 2009 12:16:24 +0000

I found a website where you could buy doormats with the word “Welcome” printed on them in binary.

I’m guessing it just took the ASCII code for each letter in “Welcome” and converted those numbers to binary, which turns out to be “01110111011001010110110001100011011011110110110101100101″

which was four rows of numbers on the doormat :P

The caption said “Welcome your friends & family into your hi-tech culture!

Lol.