How to convert string to unsigned long long ?

[hh123]

Can anyone tell me how do I convert a string to a unsigned long long type?
Thanks.

[GeoRanger]

What is an unsigned long long? Is it an unsigned 64 bit quantity? If so you might be able to use this.

typedef unsigned __int64 U64;

U64 StringToU64(const char * sz)
{
    U64 u64Result = 0;
    while (*sz != '\0')
    {
        u64Result *= 10 ;
        u64Result += *sz
                  -  '0';
        sz        ++    ;
    }
    return u64Result;
}

Cheers,
GeoRanger

[exterminator]

How to convert a string into a numeric type?

[SuperKoko]

Can anyone tell me how do I convert a string to a unsigned long long type?

I guess that a compiler supporting unsigned long long, has an overload for operator>> on istreams.
Thus, something like that should work:

template <class charT, class T>
bool FromString(const std::basic_string<charT>& InputString, T& Value)
{
std::basic_istringstream<charT> in(InputString);
return (in >> Value && in.eof());
}

For a C program, sscanf with %ull should also work.

[thelittlebomber]

http://msdn.microsoft.com/en-us/library/85zk715d.aspx

Maybe a little late, but in case someone gets to this thread with the same problem.