well, you could use the following:

std::stringstream ss;
ss << credits;
std::string creditString = ss.str();
SDL_Surface* output = TTF_RenderText_Solid(font, ss.c_str(), color);

which will allow you to blit the output surface to the screen, provided that you have already called TTF_Init() somewhere and loaded a font into the font variable. Also color is a SDL_Color.

well, you could use the following:

std::stringstream ss;
ss << credits;
std::string creditString = ss.str();
SDL_Surface* output = TTF_RenderText_Solid(font, ss.c_str(), color);

which will allow you to blit the output surface to the screen, provided that you have already called TTF_Init() somewhere and loaded a font into the font variable.