Time Capabilites Using SDL

//Using SDL, SDL_image, SDL_ttf, standard IO, strings, and string streams
#include <SDL.h>
#include <SDL_image.h>
#include <SDL_ttf.h>
#include <stdio.h>
#include <string>
#include <sstream>

Before enter the main loop to declare some variables.  pay attention to is the startTime variable (which is an Unsigned integer that's 32bits) and the timeText variable which is a string stream.

 //Main loop flag
            bool quit = false;

            //Event handler
            SDL_Event e;

            //Set text color as black
            SDL_Color textColor = { 0, 0, 0, 255 };

            //Current time start time
            Uint32 startTime = 0;

            //In memory text stream
            std::stringstream timeText;

There's a function called SDL_GetTicks which returns the time since the program started in milliseconds. For this demo,  be having a timer that restarts every time  press the return key.

 //While application is running
            while( !quit )
            {
                //Handle events on queue
                while( SDL_PollEvent( &e ) != 0 )
                {
                    //User requests quit
                    if( e.type == SDL_QUIT )
                    {
                        quit = true;
                    }
                    //Reset start time on return keypress
                    else if( e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_RETURN )
                    {
                        startTime = SDL_GetTicks();
                    }
                }
using our string stream. First call str with an empty string to initialize it to be empty. Then treat it like cout and print to it "Milliseconds since start time " and the current time minus the relative start time so it will print the time since last started the timer.

        //Set text to be rendered
                timeText.str( "" );
                timeText << "Milliseconds since start time " << SDL_GetTicks() - startTime;