trouble working with binary numbers

[dendog]

hey all;
I have a few questions about how to work with binary numbers in C++:
1. How do you read in a binary number
2. How do you print out a binary number
3. how do you store a binary number
4. how do u convert a number from its decimal form to its binary equivalent
5. how do you convert a binary number to its decimal equvalent

Are there special function and classes to do these things??

Thank you very much for all your help in advance

 

[raochetan]

As per my knowlege there are no special functions for it. As u know, any decimal number are stored in binary format in the memory. You can display them in Hexadecimal format using %x or %X in the printf statement.

Hope this helps

raochetan

 

[Zyrenthian]

1. How do you read in a binary number

char binary_number[32];
char* endPtr;
int binary_value;
cin>>binary_number;
binary_value = strtol(binary_number,endPtr,2);

2. How do you print out a binary number

for(int i = 0, j = 31;i<32;i++,j--)
{
binary_number[j] = (binary_value & (1<<i) ? '1':'0');
}
cout<<binary_number;

or


for(int i = 0, j = 31;i<32;i++,j--)
{
int bit = (binary_value & 1<<j ? 1:0);
cout<<bit;
}
cout<<endl;



3. how do you store a binary number

see above... a binary number can be put into a regular int once the conversion is done

4. how do u convert a number from its decimal form to its binary equivalent

That is a more interesting question. I have not done this but it deals with a mantisa and a bunch of other different formatting issues. Search this forum and other forums related to C/C++. I believe it was discussed already.

5. how do you convert a binary number to its decimal equvalent

see above

Matt