C++ weird error strstr -

check screenshot, have no idea what's wrong it

can me?

        if (strstr(pmaterial->gettexturegroupname(), "world textures"))         {             pmaterial->colormodulate(0.5, 0.5, 0.5);         } 

1: c2665 'strstr': none of 2 overloads convert argument types

2: e0304 no instance of overloaded function "strstr" matches argument list

your gettexturegroupname() function of std::string type. std::strstr() function not accept std::string parameter. use string c_str() member function instead:

if (std::strstr(pmaterial->gettexturegroupname().c_str(), "world textures")){     pmaterial->colormodulate(0.5, 0.5, 0.5); } 

rather falling c style strings should explore std::string facilities pointed out in comments. modified example uses std::string::find member function:

if (pmaterial->gettexturegroupname().find("world textures")!= std::string::npos){     pmaterial->colormodulate(0.5, 0.5, 0.5); }