How to store a const char* in std :: string?

    char       *buffe开发者_如何转开发r1 = "abc";

    const char *buffer2 = (const char*) buffer;

    std :: string str (buffer2);

This works, but I want to declare the std::string object i.e. str, once and use it many times to store different const char*.

What's the way out?

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You can just re-assign:

const char *buf1 = "abc";
const char *buf2 = "def";

std::string str(buf1);

str = buf2; // Calls str.operator=(const char *)

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Ah well, as I commented above, found the answer soon after posting the question :doh:

    const char* g;
    g = (const char*)buffer;

    std :: string str;
    str.append (g);

So, I can call append() function as many times (after using the clear()) as I want on the same object with "const char *".

Though the "push_back" function won't work in place of "append".

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str is actually copying the characters from buffer2, so it is not connected in any way.

If you want it to have another value, you just assign a new one

str = "Hello";

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Make a Class say MyString which compose String buffer. Have a constant of that class. and then u can reassign the value of the composed string buffer, while using the same constant.