1. Include Conio
2. C++ Conio Library
3. Conio.h In Dev C++

Function getch in C program prompts a user to press a character. It doesn't show up on the screen. Its declaration is in 'conio.h' header file. The function is not a part of standard C library.

C programming code for getch

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int main()
{
printf('Waiting for a character to be pressed from the keyboard to exit.n');

getch();
return0;
}

When you run this program, it exits only when you press a character. The glue compressor vst download free. Try pressing num lock, shift key, etc. (program will not exit if you press these keys) as these are not characters.

Try running the program by removing getch. In this case, it will exit without waiting for a character hit from the keyboard.

How to use getch in C++

int main()
{
cout <<'Enter a character';
getch();
}

Using getch in Dev C++ compiler

Function getch works in Dev C++ compiler but it doesn't support all functions of 'conio.h' as Turbo C compiler does.

Function getchar in C

int main()
{
int c;
c =getchar();
putchar(c);
return0;
}

A common use of getch is you can view the output (if any) of a program without having to open the output window if you are using Turbo C compiler or if you are not running your program from the command prompt.

Function 'clrscr' (works in Turbo C++ compiler only) clears the screen and moves the cursor to the upper left-hand corner of the screen. If you are using the GCC compiler, use system function to execute the clear/cls command.

C programming code for clrscr

Include Conio

int main()
{
printf('Press any key to clear the screen.n');

getch();

clrscr();

printf('This appears after clearing the screen.n');
printf('Press any key to exit..n');

getch();
return0;
}

C++ Conio Library

In the program, we display the message (Press any key to clear the screen) using printf and ask the user to press a key. When the user presses a key screen will be cleared and another message will be printed. Function clrscr doesn't work in Dev C++ compiler. Use the cleardevice function instead of clrscr in graphics mode.

Clear screen in C without using clrscr

Conio.h In Dev C++

int main()
{
printf('Press any key to clear the screenn');
getchar();

system('clear');// For Windows use system('cls');
return0;
}

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