switch用在编程中，如C语言中它经常跟case一起使用，是一个判断选择代码。其功能就是控制业务流程流转的。switch语句的语法如下（switch，case和default是关键字）：switch （ controllingExpression ）{ case constantExpression1 ：case constantExpression2 ：case constantExpression3 ：statements； //当满足...
C编程语言中switch语句的语法如下 - switch(expression) { case constant-expression : statement(s); break; /* optional */ case constant-expression : statement(s); break; /* optional */ /* you can have any number of case statements */ default : /* Optional */ statement(s); } 1 2 ...
switch-case statements in C and C++switch(variable) { case value: //code case value: //code default: //code } The braces are always needed following the switch statement. No braces are needed following any case. If the variable is equal to one of the values following a case, then the...
statements executed if expression does not equal any case constant-expression } 可以使用break语句结束 switch 语句中特定用例的处理并分支到 switch 语句的末尾。 如果不使用break,则程序会继续到下一用例,并执行语句,直到达到break或该语句的末尾。 在某些情况下,可能需要此继续符。
C switch( expression ) {// declarations// . . .caseconstant_expression:// statements executed if the expression equals the// value of this constant_expressionbreak;default:// statements executed if expression does not equal// any case constant_expression} ...
switch( c ) {case'A': capital_a++;case'a': letter_a++;default: total++; } All three statements of theswitchbody in this example are executed ifcis equal to'A', since nobreakstatement appears before the followingcase. Execution control is transferred to the first statement (capital_a++;...
The latest version of this topic can be found at switch Statement (C).The switch and case statements help control complex conditional and branching operations. The switch statement transfers control to a statement within its body.Syntaxselection-statement: switch ( expression ) statement...
Syntax of switch...case switch(expression) {caseconstant1:// statementsbreak;caseconstant2:// statementsbreak; . . .default:// default statements} How does the switch statement work? Theexpressionis evaluated once and compared with the values of eachcaselabel. ...
breakis optional here, we must use if we want to break the execution of switch statement, if break is not found after the block (statements written in that particular block), it will execute the statement of next case. If any of the case values does not match with the variable, default...
When using a switch / case statements, I have noticed that code generated for the last case in the switch block takes longer to begin execution than the first case code. It seems this is because the compiler is using the ?C?CCASE function call. Is there a way to get the compiler to...