const char* to char* ?

i have a function that accepts a string as 1st parameter and char* as second parameter. the problem is these parameters are going to be used in strtok and str tk wants it'ts first parameter to be char*. ive tried converting the string useing c_str() but that generates a const char*, as i said before. anyone know how i can get around this?

heres the code

Code:

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void strExtract(string PARAM_entry, char* PARAM_delim)
{
      cout<<PARAM_entry<<endl<<PARAM_delim<<endl;
      char* TMP_PARAM_entry = PARAM_entry.c_str();
      cout<<strtok(TMP_PARAM_entry, PARAM_delim);
}

---

compiler error: ( from line "char* TMP_PARAM_entry = PARAM_entry.c_str();")

"initialization to `char *' from `const char *' discards qualifiers"


i don't know what strtok will output but thats not really th point at this point in time :p

thanks for any help :)

Code:

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char* TMP_PARAM_entry = const_cast<char *>(PARAM_entry.c_str());

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props to you sir! could you tell me or link me to what you just did there, the const_cast<> thingy :)

Quote:

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Originally Posted by whackaxe

props to you sir! could you tell me or link me to what you just did there, the const_cast<> thingy :)

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const_cast is one of four standard C++ type cast operators. (The other three are dynamic_cast, static_cast, reinterpret_cast.) The const_cast operator is for making a type cast with the sole purpose of changing whether a value is const or volatile or not.
Here's a link that covers all of them
google.com :D

And this possibly modifies the string's internal buffer, possibly leading to a crash later. DON'T DO IT!!!!!
In fact, don't use strtok at all. Use string_tokenizer from the boost libraries instead.
http://www.boost.org/