一個switch可以作為外部switch的語句序列的一部分。即使內(nèi)部和外部switch的case，常含有共同的值，沖突也不會產(chǎn)生。
嵌套switch語句的語法如下：
switch(ch1) { case 'A': writefln("This A is part of outer switch" ); switch(ch2) { case 'A': writefln("This A is part of inner switch" ); break; case 'B': /* case code */ } break; case 'B': /* case code */ }
import std.stdio; int main () { /* local variable definition */ int a = 100; int b = 200; switch(a) { case 100: writefln("This is part of outer switch", a ); switch(b) { case 200: writefln("This is part of inner switch", a ); default: break; } default: break; } writefln("Exact value of a is : %d", a ); writefln("Exact value of b is : %d", b ); return 0; }
讓我們編譯和運行上面的程序，這將產(chǎn)生以下結果：
This is part of outer switch This is part of inner switch Exact value of a is : 100 Exact value of b is : 200
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