Output condition in do-while in C code

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Output condition in do-while in C code

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#1 by (3 votes)

2

I need the user to enter the numbers 1, 2 or 3 to choose the locations, and if not select one, ask again.

However, when you enter the number 0 or 4, for example, it returns to the home screen (which would be the menu of destinations, costs and exit).

I need it to say "Enter a valid city code" and ask again one of the three numbers.

What did I do wrong?

printf("Selecione a opcao desejada:\n 1 - Destinos \n 2 - Custos \n 3 - Sair\n");
    scanf("%d", &op);
    switch(op) {
        case 1 : printf("\n1 - Destinos:\n\n Codigo da cidade      Valor da passagem por pessoa\n\n");
                 printf(" 1 - Nova York    ===>      R$3.231,00\n");
                 printf(" 2 - Londres      ===>      R$3.789,00\n");
                 printf(" 3 - Dubai        ===>      R$4.932,00\n\n");
                 printf("Informe o numero de seu destino\n");
                 scanf("%d", &destino);
                 if (destino <= 0 && destino > 3) {
                 do{
                 printf("Informe um codigo de cidade valido.\n");
                 scanf("%d", &destino);
                 } while (destino <= 0 && destino > 3);
                 }

c switch do-while

asked by anonymous 24.06.2018 / 23:36

1 answer

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score 3 · Answer 1

That?

printf("Selecione a opcao desejada:\n 1 - Destinos \n 2 - Custos \n 3 - Sair\n");
scanf("%d", &op);
switch(op) {
case 1:
    printf("\n1 - Destinos:\n\n Codigo da cidade      Valor da passagem por pessoa\n\n");
    printf(" 1 - Nova York    ===>      R$3.231,00\n");
    printf(" 2 - Londres      ===>      R$3.789,00\n");
    printf(" 3 - Dubai        ===>      R$4.932,00\n\n");
    printf("Informe o numero de seu destino\n");
    scanf("%d", &destino);
    while (destino < 1 || destino > 3) {
         printf("Informe um codigo de cidade valido.\n");
         scanf("%d", &destino);
    }