C指针与指针指针-正确的用法是什么? [英] C pointer vs pointer to pointer - what's the proper usage?

问题描述

指针和双指针有什么区别

为什么要使用第二个?

char *a; //Points to a char
char **b; //Why doesn't this also point char

解决方案

双指针"只是指向另一个指针的指针.在您的示例中，指向该字符的指针的指针.

编辑 实际上，这是在此处回答的.. >

What is the difference between a pointer and a double pointer

Why would the second one ever be used?

char *a; //Points to a char
char **b; //Why doesn't this also point char

解决方案

A "double pointer" is just a pointer to another pointer. In your example, a pointer that points to a pointer that points to a char.

EDIT Actually this was answered here.

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