graphics/printing/hello-world/source/main.c

/*
    Hello World example made by Aurelio Mannara for libctru
    This code was modified for the last time on: 12/12/2014 21:00 UTC+1
*/
 
#include <3ds.h>
#include <stdio.h>
 
int main(int argc, char **argv)
{
    gfxInitDefault();
 
    //Initialize console on top screen. Using NULL as the second argument tells the console library to use the internal console structure as current one
    consoleInit(GFX_TOP, NULL);
 
    //Move the cursor to row 15 and column 19 and then prints "Hello World!"
    //To move the cursor you have to print "\x1b[r;cH", where r and c are respectively
    //the row and column where you want your cursor to move
    //The top screen has 30 rows and 50 columns
    //The bottom screen has 30 rows and 40 columns
    printf("\x1b[16;20HHello World!");
 
    printf("\x1b[30;16HPress Start to exit.");
 
    // Main loop
    while (aptMainLoop())
    {
        //Scan all the inputs. This should be done once for each frame
        hidScanInput();
 
        //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
        u32 kDown = hidKeysDown();
 
        if (kDown & KEY_START) break; // break in order to return to hbmenu
 
        // Flush and swap framebuffers
        gfxFlushBuffers();
        gfxSwapBuffers();
 
        //Wait for VBlank
        gspWaitForVBlank();
    }
 
    gfxExit();
    return 0;
}