假设我有一个枚举。enumclassShapeName:char{TRIANGLE,CIRCLE,SQUARE};后来我有这样的功能:voidFunction(ShapeNameconstshape){switch(shape){caseShapeName::TRIANGLE:DoSomething1();break;caseShapeName::CIRCLE:DoSomething2();break;caseShapeName::SQUARE:DoSomething3();break;default://THISCODEBLOCKSHOULDNEVERBEEXECUTED!}retu