English 中文(简体)
con子和 in子的区别是什么?
原标题:Whats the difference in const pointer and integer const pointer?

在阅读有关点人的教学时,我面临着类似守则。

const int *p;

以及

int const *p;

以及

int *const p;

其中的主要区别是什么?

虽然我指定了任何股本价值地址,例如,

int b=100;
b=&p;

i 正在出现错误。 这一点是什么? 谁能以身作解释?

最佳回答

Most of the time, simply read it from right to left.

int const *p;

p is a pointer to a constint <<>int

int *const p;

p is a const pointer to an int

例外情形是<代码>const 是最关键词:

const int *p;

之后,它与:

int const *p;

如果点名为<代码>const,则您可修改其地址,但您可更改其指明的价值。 如果指出价值为<代码>const(如果是的话,int),那么你可以修改点人所指出的内容(但你可以指出其他内容)。

与此无关的是,这未能编纂:

int b=100;
b=&p;

由于您将点码和可核实地址(int ** )重新定位为b。 非法转换。 你可以用 cast子迫使它,但我不认为这是你想要的。

问题回答

暂无回答




相关问题
Fastest method for running a binary search on a file in C?

For example, let s say I want to find a particular word or number in a file. The contents are in sorted order (obviously). Since I want to run a binary search on the file, it seems like a real waste ...

Print possible strings created from a Number

Given a 10 digit Telephone Number, we have to print all possible strings created from that. The mapping of the numbers is the one as exactly on a phone s keypad. i.e. for 1,0-> No Letter for 2->...

Tips for debugging a made-for-linux application on windows?

I m trying to find the source of a bug I have found in an open-source application. I have managed to get a build up and running on my Windows machine, but I m having trouble finding the spot in the ...

Trying to split by two delimiters and it doesn t work - C

I wrote below code to readin line by line from stdin ex. city=Boston;city=New York;city=Chicago and then split each line by ; delimiter and print each record. Then in yet another loop I try to ...

Good, free, easy-to-use C graphics libraries? [closed]

I was wondering if there were any good free graphics libraries for C that are easy to use? It s for plotting 2d and 3d graphs and then saving to a file. It s on a Linux system and there s no gnuplot ...

Encoding, decoding an integer to a char array

Please note that this is not homework and i did search before starting this new thread. I got Store an int in a char array? I was looking for an answer but didn t get any satisfactory answer in the ...

热门标签