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switch
的case
常數包含公共值,也不會產生任何衝突。
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
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