将指针分配给整数 [英] Assigning a pointer to an integer

问题描述

我可以分配一个指向整数变量的指针吗?像下面这样.

Can I assign a pointer to an integer variable? Like the following.

int *pointer;
int array1[25];
int addressOfArray;

pointer = &array1[0];

addressOfArray = pointer;

有可能这样做吗?

推荐答案

并非没有显式强制转换，即

Not without an explicit cast, i.e.

addressOfArray = (int) pointer;

还有一个警告:

6.3.2.3指针
...
6任何指针类型都可以转换为整数类型.除先前指定的内容外， 结果是实现定义的.如果结果无法以整数类型表示， 行为是不确定的.结果不必在任何整数的值范围内 类型.

6.3.2.3 Pointers
...
6 Any pointer type may be converted to an integer type. Except as previously specified, the result is implementation-defined. If the result cannot be represented in the integer type, the behavior is undefined. The result need not be in the range of values of any integer type.

因此，不能保证结果是有意义的整数值.

So the result isn't guaranteed to be a meaningful integer value.

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