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Editorial Team
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Asked: 2026-06-13T09:51:23+00:00

I’m currently learning to do output with TTF files and was wondering how i

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I’m currently learning to do output with TTF files and was wondering how i can output the font using variables with strings?

For example, i have the position of the mouseX and mouseY defined as Int.

I want to output a string like:

Mouse X: mouseX, Mouse Y: mouseY

This is where I output the text:

 font_surface = TTF_RenderText_Solid(font_file,"MouseX: //need to add variable MouseY: //here too",font_color);

Does any one know the syntax to incorporate the variables to this function with the string ?

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1 Answer

  1. Editorial Team

    When I used SDL_ttf, I used stringstream to build my strings. You could also use sprintf but that’s generally discouraged in a C++ app.

    #include <sstream>
...
std::stringstream s;
s << "Mouse xpos: " << xpos << " Mouse ypos: " << ypos;
fontSurface = TTF_RenderText_Solid(font_file, s.str().c_str(), font_color);

    .str() produces an STL string, and then .c_str() returns a const char* to the guts of the STL string, which SDL, a pretty firmly C library, expects.

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