Anyone knows how to do this

[Kohinoor24]

typedef std::string T_String;
typedef char T_8bit;
typedef short T_16bit;
typedef int T_32bit;

I have defined these typedefs and I want to convert the "T_string" type to short,char and int type.

I have a function like this:

void C_Ptx::Built_AMB(T_String value,bool ChainType)

where I need to convert the 1st parameter to short,char and int type.

How can I do it! please Help.

Kohinoor

[NMTop40]

two options spring to mind:

For a char it is simple - the first character is your 'char'

For the others:

1. Use a C function such as strtol, but you'll need to call c_str() on the string. (No doubt the method Thew would suggest)

2. Create an ostringstream from the string and then use >>

You can do the same with double and also if you have wstring, in which case you use owstringstream instead.


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[Graham]

What do you mean by "convert"? If you mean you want to read a value coded in the string, then that's relatively simple:

#include <string>
#include <sstream>
// read an int from a string
std::string s = "12345";
std::istringstream iss(s);
int i;
iss >> i; // i now equals 12345



If, however, by "convert" you mean "cast", then forget it.

He who breaks a thing to find out what it is, has left the path of wisdom - Gandalf

[Graham]

"istringstream", surely :-)

He who breaks a thing to find out what it is, has left the path of wisdom - Gandalf

[NMTop40]

yes of course :)



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