48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/*
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This program shows how to use a WHILE statment to keep displaying
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the key pressed on the screen. It terminates when the 'q' key is
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pressed
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*/
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#include <stdio.h> /* Standard include files */
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#include <stdlib.h>
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#include <conio.h>
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int main( void )
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{
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char x; /* Define a variable of type char */
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printf("Press a key ");
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x = getch(); /* Use getch to read a keypress and store the */
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/* result in 'x'. We do this initially so that */
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/* there is a value in 'x' for the while statment */
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/* to consider the first time round */
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/* We now use the while statement. The 'loop' continues to execute */
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/* until such time as the expression in the brackets becomes false */
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/* we use != , meaning 'Not Equal to' as the test, as we wish the */
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/* the statements to be executed every time we press a key other */
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/* than 'q'. Once we press 'q' the code continues on to the next */
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/* statement */
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while ( x != 'q' )
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{
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/* Display a message on the screen */
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printf("\nThe key you pressed was the %c key\n",x );
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/* Get a new value for X, if we do not the 'expression' will never */
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/* change, and the loop will go for ever */
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printf( "Press another key or q to quit \n");
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x = getch();
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}
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return 0;
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}
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