string to char* or char[]

Hi,
i want to convert a string to char * or char[]

i tried:

Code:

---

string a="123";
char *b=a.c_str();

---

c_str() returns a const char* . I dont want that. I just want char* or char [] only.

any way to solve the problem?

thanks,
Rahul

Well... why do you want to do this?

I want to tokenise a string(in string format) base on specified delimiters.

Code:

---

void getTokens(char str[],char delims[]){
       
    char *result = NULL;
    result = strtok( str, delims );
    while( result != NULL ) {
        cout<<result<<endl;
        result = strtok( NULL, delims );
    }
}

---

Then main function actually intends to pass in a string.

Code:

---

int main(void){
       
        string a="a#bc#def#ghij#klmno";
        //SINCE I CAN'T PASS IN A STRING,HAVE TO PASS IN A CHAR*

        char* rt=a.c_str();
    //error here.cant convert from const char* to char*
        getTokens(rt,"#");
        return 1;
}

---

The error is as stated above. cant convert from char* to const char*

Instead of using strtok(), use the functionality provided by std::string, e.g.,

Code:

---

void getTokens(const std::string& str, const std::string& delimiters) {
    using std::string;
    string::size_type index = 0;
    while ((index = str.find_first_not_of(delimiters, index)) != string::npos) {
        string::size_type end_index = str.find_first_of(delimiters, index);
        std::cout << str.substr(index, end_index - index) << std::endl;
        index = end_index;
    }
}

---