move exercises and lectures into subfolders

Lectures/LC9/While1/while_example_version_1.c

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