Question

I’m trying create simple application in C++. This application has to read from file and displays data. I’ve written function:

std::vector <AndroidApplication> AndroidApplication::getAllApp(){
    std::vector<AndroidApplication> allApp;
    std::fstream f;

    f.open("freeApps.txt");
    std::string line;
    if(f.is_open()){
        while(getline(f, line)) {
            std::string myLine = "";
            char * line2 = line.c_str();
            myLine = strtok(line2,"\t");

            AndroidApplication * tmpApp = new AndroidApplication(myLine[1], myLine[2], myLine[4]);
            tmpApp->Developer = myLine[0];
            tmpApp->Pop = myLine[3];
            tmpApp->Type = myLine[5];
            allApp->pushBack(tmpApp);
        }
    }
    return allApp;
}

It throws me an error in line:

myLine = strtok(line2,"\t");

An error:

cannot convert from ‘const char *’ to ‘char *’

Could you tell me how can I deal with it?

Answer 1

To use strtok, you’ll need a writeable copy of the string. c_str() returns a read-only pointer.