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;
}