Matlab巢狀switch語句

2019-10-16 23:16:09

可以將一個switch作為外部switch語句序列的一部分。即使內部和外部switchcase常數包含公共值,也不會產生任何衝突。

語法

巢狀switch語句的語法如下 -

switch(ch1) 
   case 'A' 
   fprintf('This A is part of outer switch');
      switch(ch2) 
         case 'A'
         fprintf('This A is part of inner switch' );

         case 'B'  
         fprintf('This B is part of inner switch' );
      end   
   case 'B'
   fprintf('This B is part of outer switch' );
end

例子

建立指令碼檔案並在其中鍵入以下程式碼 -

a = 100;
b = 200;
switch(a) 
   case 100 
   fprintf('This is part of outer switch %d\n', a );
   switch(b) 
      case 200
      fprintf('This is part of inner switch %d\n', a );
   end
end
fprintf('Exact value of a is : %d\n', a );
fprintf('Exact value of b is : %d\n', b );

執行上面範例程式碼,得到以下結果 -

This is part of outer switch 100
This is part of inner switch 100
Exact value of a is : 100
Exact value of b is : 200