switch-examples/templates/application/source/main.c

#include <string.h>
#include <stdio.h>

#include <switch.h>

int main(int argc, char **argv)
{
    gfxInitDefault();
    consoleInit(NULL);

    printf("Hello World!");

    // Main loop
    while(appletMainLoop())
    {
        //Scan all the inputs. This should be done once for each frame
        hidScanInput();

        // Your code goes here

        //hidKeysDown returns information about which buttons have been just pressed (and they weren't in the previous frame)
        u64 kDown = hidKeysDown(CONTROLLER_P1_AUTO);

        if (kDown & KEY_PLUS) break; // break in order to return to hbmenu

        gfxFlushBuffers();
        gfxSwapBuffers();
        gfxWaitForVsync();
    }

    gfxExit();
    return 0;
}