How to resolve the algorithm Keyboard input/Obtain a Y or N response step by step in the ERRE programming language

Published on 12 May 2024 09:40 PM
#Erre

How to resolve the algorithm Keyboard input/Obtain a Y or N response step by step in the ERRE programming language

Table of Contents

Problem Statement

Obtain a valid   Y   or   N   response from the keyboard. The keyboard should be flushed, so that any outstanding key-presses are removed, preventing any existing   Y   or   N   key-press from being evaluated. The response should be obtained as soon as   Y   or   N   are pressed, and there should be no need to press an   enter   key.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Keyboard input/Obtain a Y or N response step by step in the ERRE programming language

Source code in the erre programming language

!$KEY
................
! flush the keyboard buffer
! --------------------------------
! you can use POKE(198,0) in C-64 
! ERRE version
! --------------------------------
REPEAT
  GET(K$)
UNTIL K$=""

PRINT("Press Y or N to continue")
REPEAT
  GET(K$)
UNTIL INSTR("YyNn",K$)<>0
!
! with C-64 you must write a line like 
! UNTIL K$="Y" OR K$="N"
!  

PRINT("The response was ";K$)
.................

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