switch statement
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Ejecuta el código en función del valor de una discusión integral
Original:
Executes code according to value of an integral argument
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Usado donde una o varias de muchas ramas de código necesita ser ejecutado de acuerdo a un valor integral .
Original:
Used where one or several out of many branches of code need to be executed according to an integral value.
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Contenido |
[editar] Sintaxis
switch ( expression ) {
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[editar] Explicación
expression deberá ser una expresión, convertible a un valor entero .
Original:
expression shall be an expression, convertible to an integer value.
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Todos constant_expressions deberá ser expresiones constantes, convertibles a un valor entero, que es único dentro de esta declaración
switchOriginal:
All constant_expressions shall be constant expressions, convertible to an integer value, which is unique within this
switch statementThe text has been machine-translated via Google Translate.
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Si el expression evalúa como un valor, igual al valor de uno de los constant_expressioni definido, el statementi (si están presentes) y todas las declaraciones posteriores (excepto default_statement, si está presente) se ejecutan. Si el valor de la expression no está de acuerdo con cualquiera de las constant_expressions, la default_statement se ejecuta si está presente .
Original:
If the expression evaluates to a value, equal to the value of one of the defined constant_expressioni, the statementi (if present) and all subsequent statements (except default_statement, if present) are executed. If the value of the expression does not match any of the constant_expressions, the default_statement is executed if present.
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Es útil tener en cuenta, que si la ejecución de las instrucciones subsiguientes no es deseable, el <div class="t-tr-text"> romper comunicado
se puede utilizar. En ese caso, la ejecución de la instrucción Original:
break statement
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switch termina . Original:
It is useful to note, that if the execution of subsequent statements is undesirable, the
romper comunicado</div> can be used. In that case the execution of the
Original:
break statement
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switch statement terminates. The text has been machine-translated via Google Translate.
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[editar] Palabras clave
[editar] Ejemplo
El código siguiente muestra varios casos de uso del interruptor' Estado
Original:
The following code shows several usage cases of the switch statement
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#include <iostream> int main() { int i = 2; switch (i) { case 1: std::cout << "1"; case 2: std::cout << "2"; //execution starts at this case label case 3: std::cout << "3"; case 4: case 5: std::cout << "45"; break; //execution of subsequent statements is terminated case 6: std::cout << "6"; } std::cout << '\n'; switch (i) { case 4: std::cout << "a"; default: std::cout << "d"; //there are no applicable constant_expressions //therefore default_statement is executed } std::cout << '\n'; switch (i) { case 4: std::cout << "a"; //nothing is executed } }
Salida:
2345 d
