偶然读文档碰到的问题

jesse_z

In the code:

   while(expression)
   {
       int v = 33;
       char str[20];
       ...
    }

so,will v be set to 33 in every loop?

文档中说答案是否定的。不理解为什么，请高手给予指点，感激不尽

dollfacedboy

compile the code and then disassemble it,you'll find the answer.It's sure that you need to review the c programming language.

bosser

哈哈！这个呢？

for (i = 0; i < 10; i++)
{
    static int j = k;
}

so,will j be set to k in every loop?

joe_y

编译器优化

jesse_z

以下是引用dollfacedboy在2009-12-15 22:58:15的发言：
compile the code and then disassemble it,you'll find the answer.It's sure that you need to review the c programming language.

vc里面跟过，int v = 33; 这句汇编级每次都是会move的啊

jesse_z

以下是引用bosser在2009-12-16 9:46:36的发言：
哈哈！这个呢？

for (i = 0; i < 10; i++)
{
                                static int j = k;
}

so,will j be set to k in every loop?

不懂，还请高人继续指点，谢谢

bosser

嘿嘿，搞错了！应该是这个例子：
for (i = 0; i < 10; i++)
{
    static int j = 32;
    j++; //==> so,will j be set to 33 in every loop?
}

so,will j be set to 33 in every loop?


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