Ejemplo de CASE en Builder

8/2/2019 Ejemplo de CASE en Builder

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Capturar en maysculas en un objeto TMemo

enero 14, 2009

En C++ Builder 6, los objetos TEdit tienen una propiedad llamada CharCase en la que

podemos seleccionar la opcin ecUpperCase para obligar a que se capture en maysculas

en ese objeto sin importar si el usuario selecciona minsculas en su teclado.

Los objetos TMemo no cuentan con esa opcin, si queremos obtener un efecto equivalente

a poner ecUpperCase en la propiedad CharCase de los objetos TEdit, podemos poner el

siguiente cdigo en el evento OnKeyPress del TMemo:

ver fuente

imprimir?

01switch(Key)

02 {

03 case'':

04 Key = '';

05 break;

06 case'':

07 Key = '';

08 break;

09 case'':

10 Key = '';

11 break;

12 case'':

13 Key = '';

14 break;

15 case'':

16 Key = '';

17 break;

18 case'':

19 Key = '';

20 break;

21 default:

22 Key = UpCase(Key);

23
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If the statement to execute is (very) short, you can write it on the same line with the

condition that is being checked.

Consider a program that is asking a user to answer Yes or No to a question such as"Are you ready to provide your credit card number?". A source file of such a program

could look like this:

//---------------------------------------------------------------------------#include #include using namespace std;#pragma hdrstop

//---------------------------------------------------------------------------

#pragma argsusedint main(int argc, char* argv[]){

char Answer;

// Request the availability of a credit card from the usercout > Answer;

// Since the user is ready, let's process the credit card transactionif(Answer == '1')cout


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char Answer;

// Request the availability of a credit card from the usercout > Answer;

// Since the user is ready, let's process the credit card transactionif(Answer == '1')

cout > Answer;

// Since the user is ready, let's process the credit card transactionif(Answer == '1'){

cout CreditCardNumber;

}

cout


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return 0;}//---------------------------------------------------------------------------

If you omit the brackets, only the statement that immediately follows the condition

would be executed.

When studying logical operators, we found out that if a comparison produces a true

result, it in fact produces a non zero integral result. When a comparison leads tofalse, its result is equivalent to 0. You can use this property of logical operations and

omit the comparison if or when you expect the result of the comparison to be true,that is, to bear a valid value. This is illustrated in the following program:

//---------------------------------------------------------------------------#include #include using namespace std;#pragma hdrstop

//---------------------------------------------------------------------------

#pragma argsusedint main(int argc, char* argv[]){

int Number;

cout > Number;

if(Number)

cout

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Ejemplo de CASE en Builder