vb to c++

[Amon Ra]

HOW WOULD THIS FUNCTION BE WRITTEN IN C++:
Private Function CBinary(ByVal dec as integer) as String
dim x as integer
CBinary = ""

For x = 0 to 7
if dec and 2^x then
CBinary = "1" & CBinary
else
CBinary = "0" & CBinary
end if
Next x
End Function

WHAT ABOUT THIS ONE:
Private Function CDecimal(ByVal bin as String) as Integer
dim x as Integer
for x=0 to (len(bin)-1)
If Mid(bin, Len(bin) - x, 1) = "1" Then
CDecimal = CDecimal + (2^x)
End If
Next x
End Function
How would i convert these vb functions to correct c++ functions? Thanx in advance.

[Warmaster199]

The second one looks like it's supposed to convert a string to an integer...

This will convert an int to a string:
char *itoa(int value, char *digits, int base);

long to string:
char *ltoa(long value, char *digits, int base);

string to int:
int atoi(char *string);

string to long:
long atol(char *string);

[Amon Ra]

Ok, thanks, basically what the first func. does is convert a decimal(integer) to a binary(string). The second one func converts a binary(string) to a decimal(integer).
Could you please translate the functions to c++? I have never worked with strings in c++(mid, right...). I would appreciate if you could translate them, because I want to put them in a c++ dll. Thanks in advance

[parksie]

Use itoa and atoi, but set the base (or radix) to 2.

[Amon Ra]

Is that how to convert decimal to binary in c++? If yes it is not to hard BTW, do I need to include a header for the string functions?

[Amon Ra]

Should i make a char[8] to hold the binary string?

[Amon Ra]

How would i force the string to be only 8 char long?

[parksie]

If you cast it to char then it will be no more than 8 chars. However, bear in mind that if you supply a negative number it will have the 8th bit as 1 (the sign bit).

[Warmaster199]

For strings in C/C++, do a
#include<string.h>

For those itoa() and atoi(), do a
#include<stdlib.h>

To declare a string, do this:
char *var[]; or
char *var;

To do a fixed-length string of say 20 chars:
char *var[20];

And there you have it... Strings in C/C++

[parksie]

To do a fixed-length string of say 20 chars:
char *var[20];

It's char var[20];

[Amon Ra]

Ok ,thanks a lot, i am gonna try that. Thx