PaulS:
It looks to me like you are just splattering code around without a clue as to what you are doing.main does not terminate correctly.
display has a body, even though it is NOT a function declaration.
getch() returns a value that you discard. It won't work on an Arduino, anyway, since the Arduino doesn't have a keyboard.
printf() won't work, because the Arduino doesn't have a console.You have no clue when to use { and }, and when not to.
sir post #32 and #35 says I am Using 'C' but not ARDUINO
My project is for ARDUINO First let me learn to program in 'C' after that I will Program the same in ARDUINO
I am new to programming I have just learnt 'C' Programming Language that to from YOU TUBE and from net surfing and Book's