anything to binary

[award982]

Hey all!

I was trying to create a decimal to binary converter in c++ (and phailed misorably)
I wanted to ask, has anyone created a bynary to text and text to binary converter and could share the source? i want to build a program that can convert anything to anything.

[hamsterman]

Input functions do that for you. Note that numbers are stored in bits, that means already binary. You just have to read them the right way.

int number;
for(int i = sizeof(int)-1; i >= 0; i--){
    if(number & (1<<i)) cout<<'1';
    else cout<<'0';
}

[Bazzy]

A text (string) to binary converter is found in the sourcecode section: http://www.cplusplus.com/src/
A number to binary is found in C++ std library: http://www.cplusplus.com/reference/stl/bitset/

[warhol]

What does the " (number & (1<<i)) " bit mean? I haven't seen that syntax before.

[warhol]

A little research suggests that the '&' is being used as the boolean AND binary operator... That makes sense, so it's performing the bitwise AND operation on 'number' and whatever '(1<<i)' evaluates to.

I know '<<' as the insertion operator. '1' isn't a stream variable. Any ideas?

[jsmith]

1 in decimal is 000...00001 in binary.

1 << i shifts the binary representation of 1 i bits to the left.

number & (1 << i ) therefore zeroes out all bits in number but leaves the ith bit unchanged (LSB is bit 0).

[warhol]

shift operator...Gotcha. Thanks.