Converting AnsiString to double

[Franz Seidl]

Hello,

how can i convert a AnsiString to double?

I'm using C++ Builder 5 from Borland...

Greets,
Franz

 

[Greg]

Hello,

how can i convert a AnsiString to double?

I'm using C++ Builder 5 from Borland...

Greets,
Franz

how about:

#include <iostream>
#include <string>
#include <sstream>

int main()
{
std::string pi("3.1459");

std::stringstream s(pi);
double d;

s >> d;

std::cout << "d is " << d << std::endl;
}

output:
d is 3.1459

Greg

 

[Franz Seidl]

Hello Greg,

is there a way to use a AnsiString (sorry but normally I'm
programming in Delphi, PHP, C#)?

Greets,
Franz

 

[red floyd]

Hello Greg,

is there a way to use a AnsiString (sorry but normally I'm programming
in Delphi, PHP, C#)?

Greets,
Franz

Ask in a borland newsgroup.

 

[Franz Seidl]

Ask in a borland newsgroup.

I was searching for it before. But my newsserver has only a pascal
newsgroup from borland...

Greets,
Franz

 

[John Harrison]

I was searching for it before. But my newsserver has only a pascal
newsgroup from borland...

Greets,
Franz

Does AnsiString have some method to convert to a C string? I'm sure it does.

If so then you can use the sscanf function

AnsiString a = "12.34";
double d;
sscanf(a.some_method_to_convert_to_a_C_string(), "%lf", &d);

john

 

[Franz Seidl]

Hello John,

Does AnsiString have some method to convert to a C string? I'm sure it
does.

If so then you can use the sscanf function

AnsiString a = "12.34";
double d;
sscanf(a.some_method_to_convert_to_a_C_string(), "%lf", &d);

Yes, you are right. There are a function called "a.c_str()"...

Thank you!

Greets,
Franz

 

[DJ Franke]

Hi !

The Borland IDE is full of helpfull hints. Press F1 with the cursor on
the text 'AnsiString' and you will find the '.ToDouble()' function
under methods in the help menu.

Have fun

 

[Old Wolf]

I was searching for it before. But my newsserver has only a pascal
newsgroup from borland...

use the web interface at http://newsgroups.borland.com/ .

 

[Dweia]

Hello,

how can i convert a AnsiString to double?

I'm using C++ Builder 5 from Borland...

Greets,
Franz

So, I fire up trusty ole google and go off to see if we can find
anything that might do waht you're looking for.

Lo and behold, within about 5 seconds I find the strtod function
http://www.cplusplus.com/ref/cstdlib/strtod.html