getch() waits for the user to input a character and
displays the output till the user enters a character.As
soon as the user enters a character it transfers the
control back to the main function, without displaying what
character was entered.
getche() does the same thin but it displays the chacter
entered.here e stands for echo.
getch() is used to wait the execution of program on console
unless program will skeep the output witout showing on
console of program in short it all time to user to see
output during the run time of program
Both getch() and getche() are used to read single character
there is very little difference
-getch() doesn't display output to screen if used without lvalue
-getche() display output to screen even if used without lvalue
following example will clear this.....
after running above programs...............
when you press any key, you'll exit from output screen
verify the output by pressing alt+F5
1. will not show anything
2.will show the key you were pressed......
hope you get it.............
What is the result
unsigned int u =-16;