Logical expression to (while or if) create repeat until the user hits the answer

Question

Logical expression to (while or if) create repeat until the user hits the answer

I'm having problems with a question to set the result of a question in VisualG, so if the user answers the wrong way the question will repeat itself until the user gets it right.

The question is: "if you agree answer with (s) For Yes or (n) for no".

Here is the code I created:

var
  RESPOSTA: CARACTERE
inicio
        Enquanto RESPOSTA <> "n" faca
        Escreva("Esta de acordo?:")
        Leia(RESPOSTA)
          Se RESPOSTA <> "n" entao
            Escreval
            Escreval("Resposta incorreta.")
            Escreval("Vamos tentar novamente.")
            Escreval
            Escreval("Lembre-se!")
            Escreval("Para Responder SIM, Digite a LETRA (s), ou Digite a letra (n) para Responder Não.")
            Escreval("Boa Sorte!")
            Escreval
          Fimse
          Se RESPOSTA = "n" entao
            Escreval
            Escreva("Parabéns, voçê acertou!")
          Fimse
        Fimenquanto
fimalgoritmo

The problem is that I was only able to put the letter n to work as "no". I would like to to know if there is any form of I can also put the letter s for the answer "Yes".

All this so that the incorrect answer phrase repeats until the user hits the answer so that it stays N for no and S for Yes.

0

portugol pseudocódigo

Author: hkotsubo, 2019-08-16

Source

1 answers

score 1 · Answer 1

Your optimized code will look like this:

var
  RESPOSTA: CARACTERE
  CONDICAO: LOGICO
inicio
      CONDICAO <- VERDADEIRO


      ENQUANTO CONDICAO = VERDADEIRO FACA
           Escreval("==========================================")
           Escreval("               Lembre-se!                 ")
           Escreval("         Use LETRAS MAIUSCULAS            ")
           Escreval("  Para Responder SIM, Digite a LETRA (S)  ")
           Escreval("ou Digite a letra (N) para Responder Não. ")
           Escreval("               Boa Sorte!                 ")
           Escreval("==========================================")
           Escreval("    ")


      Escreval("Esta de acordo?: ")
        Leia(RESPOSTA)
        CONDICAO <- FALSO

      ESCOLHA RESPOSTA
         caso "s"
           Escreval("!!!!!!!!!!!!!!!!!!!!!!!")
           escreval("Parabéns, você acertou!")
           Escreval("!!!!!!!!!!!!!!!!!!!!!!!")

         caso "n"
           Escreval("***************************")
           Escreval("    Resposta incorreta.    ")
           Escreval("***************************")
           Escreval("                           ")
           Escreval("  Vamos tentar novamente.  ")
           Escreval("                           ")
           Escreval("                           ")
           Escreval("                           ")

           CONDICAO<- VERDADEIRO

        outrocaso
           Escreval("                           ")
           Escreval("                           ")
           Escreval("############################################")
           Escreval("    Você  digitou um caracter inválido     ")
           Escreval("############################################")
           Escreval("                           ")
           Escreval("                           ")
           CONDICAO<- VERDADEIRO

           fimescolha

      FIMENQUANTO

fimalgoritmo

I chose to use the command choose-case instead of the command if-then, since it will be more complex to implement your pseudocode using this command(if-then).

However, it is worth mentioning that the optimization of pseudocode is carried out in numerous ways, it may be that you find, on the internet or with your teacher, the solution of your problem with other commands, however fully functional.

O operation of the choose-if Command is described below:

The reserved words of this statement are escolha, caso e fimescolha, being optional the use of outrocaso, as is the case with se... entao statement that can use senao (Composite selection) or não (simple selection).

It is important to note that this selection statement already has its relational operation defined and can not be used other than equality, which is implicit in this instruction (the symbol never appears = in the statement ). By means of it it is only possible to check if there is equality between an integer value or desired character that you want evaluate, where their veracity will result only in the execution of the others instructions available in the case that corresponds to the value equal to valued.

If none of the values are specified as a case of this multiple choice instruction will execute the available instructions No outrocaso, if or even exist, or the algorithm will continue its execution after fimescolha.

General syntax form
escolha (<identificador>)
  caso <valor_1>
    primeiro bloco de instrução
  caso <valor_2>
    segundo bloco de instrução
  caso <valor_3>
    terceiro bloco de instrução
  outrocaso
    bloco de instrução do outro caso (valor diferente de todos anteriores)
fimescolha
// continua as instruções do algoritmo em execução
In writing <valor_1>, <valor_2> and <valor_3> correspond to possible integer values or character that will be compared to the value which is stored in what will be described at the beginning of this instruction, right after the reserved word choice, the even in parentheses.

Thus, the relational operation of equality will be performed without symbol of same is described, explicitly, in the statement

Flowchart :

Source: pseudocode control structures