Searching a C++ string and strip off text if present

I have to handle two types of string:

// get application name is simple function which returns application name. 
// This can be debug version or non debug version. So return value for this
// function can be for eg "MyApp" or "MyApp_d开发者_Python百科ebug".

string appl = getApplicationName();
appl.append("Info.conf");

cout << "Output of string is " << appl << endl;

In above code appl is MyAppInfo.conf or MyAppInfo_debug.conf.

My requirement is whether it is debug or non-debug version I should have output of only one i.e., MyAppInfo.conf. How can we check for _debug in string and if present and how do we strip of that so that we always get output string as MyAppInfo.conf?

I would wrap getApplicationName() and call the wrapper instead:

std::string getCanonicalApplicationName()
{
    const std::string debug_suffix = "_debug";
    std::string application_name = getApplicationName();
    size_t found = application_name.find(debug_suffix);
    if (found != std::string::npos)
    {
        application_name.replace(found, found + debug_suffix.size(), "");
    }
    return application_name;
}

See the documentation for std::string::find() and std::string::replace().

 string appl = getApplicationName(); //MyAppInfo.conf or MyAppInfo_debug.conf.
 size_t pos = appl.find("_debug");
 if ( pos != string::npos )
        appl = appl.erase(pos, 6);
 cout << appl;

Output is always:

MyAppInfo.conf

See sample output : http://www.ideone.com/x6ZRN