increment Well, here, I'm calling my own function, increment.
这里,我调用我自己的函数。
Implicit declaration of function increment.
函数增长的隐式说明。
Now if you call a function, swap like increment or cube or swap, or in this case, foo, those variables are the parameters to that function, end up getting stored next in memory.
现在如果你调用一个函数,像increment或者cube或者,或者在这个例子里,foo,这些变量都是,函数的参数,在内存中存储。
So putting back that prototype allows me to compile this, because I'm saying proactively to the compiler hey, you're going to see a function called increment.
把那个原型放回原处使我能够编译它,因为我提前向编译器打了招呼,将看到一个叫做increment的函数。
So even though increment is obviously increment declared and defined in this function, it's later; so it's too late for me to use it in main.
很明显,即使在这个函数中,已经声明和定义;,也太迟了,以至于,我在main函数中不能使用它。
X So here I'm declaring another variable called X, and this is totally legitimate because I already know that if I'm implementing a function like swap or increment, I can absolutely take input.
这里我声明另一个变量,这个完全是合法的因为我已经知道,如果我执行一个像swap,或,increment的函数,我完全可以携带输入。
So this function increment takes nothing, returns nothing, and yet it does something.
所以increment函数不带入参,也不返回值,它也没做什么。
So pictorially, it's as though there's now some other part of the blackboard here, maybe way up here where I can put anything I want that's accessible to main, that's accessible to swap, that's accessible to increment or any other function I might implement because it is, in fact, global.
绘画般地,它是在这里黑板上的其他部分,可能在这里的上面,我在哪里可以放置这些东西,使它们可以被main函数使用,可以被swap函数使用,可以被increment函数使用,或者我所实现的其它函数,因为它实际上是一个全局变量。
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