函数指针和变量指针之间的差异 [英] The different between function pointer and variable pointer

问题描述

大家好



请告诉我

函数指针和变量指针之间的差异

<非常感谢
非常感谢



我的尝试：



函数指针和变量指针之间的差异

Hi all

Please tell me about
the different between function pointer and variable pointer

Many thanks

What I have tried:

The different between function pointer and variable pointer

推荐答案

区别在于指针的类型。它们都是指针，这意味着内存中的地址。



不匹配或误用指针会导致崩溃，所以我坚持使用键入指针并做好记录类型广告。



这里有一些关于指针的教程第15章到第18章。



了解这些问题是C程序员的基本技能。真的; - ）

The difference is the "type" of the pointer. Both of them are pointers, that means the are addresses in the memory.

Mismatching or misusing pointers will lead to crashes, so I stick to typed pointers and do well documented type cast.

Here is some tutorial about pointers in the chapters 15 to 18.

It is a fundamental skill of a C programmer to understand these problems. Really ;-)

函数指针保存函数的地址。变量指针保存变量的地址。通常，您使用函数指针调用函数和指向变量的指针来访问变量的内容。例如

A function pointer holds the address of a function. A variable pointer holds the address of a variable. Typically you use a function pointer to call a function and a pointer to variable to access the variable's content. E.g.

#include <stdio.h>
int square(int x){return x*x;}
int main()
{
  float f = .5f;

  int (*fun)(int) = square; // 'fun' is pointer to function

  float * p = &f; // 'p' is pointer to variable

  *p /= 2;

  printf("%d %f\n", fun(2), f);


 return 0;
}

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