C中的字符指针 [英] Char pointers in C
问题描述
嗨。
我正在试图弄清楚C中的指针和内存分配。我在互联网上阅读了不少解释并阅读了一些内容我有的书，但我不是那么聪明......
我想做的是创建一个包含五个字符指针的数组。我希望能够通过setParams函数为params数组指定一个指针。我不明白我没有得到什么，但肯定有一些东西。看起来这样可行：
Hi.
I''m trying to figure out pointers and memory allocation in C. I''ve read quite a few explanations on the internet and have read in a few books that I''ve got, but I''m not so much smarter yet...
What I want do do is to create an array of five pointers to characters... I want to make it possible to assign a pointer to the params array tohrough the setParams function. I don''t understand what I have not gotten, but there is certainly something. It seems like this works:
推荐答案
我不喜欢malloc，但似乎你必须将它转换为你想要的数据类型
I''m not that familliar with malloc, but it seems you have to cast it to the data type you want
否你不必投下malloc，你可能不想，因为它没有帮助，但可以伤害。除非你想在C ++下编译，否则C会隐式执行转换。
krreks，你不会写val1 ++。您可以对其进行索引，例如val1 [2]。你基本上有一个数组（动态分配），你可以索引该数组，对吗？想想阵列。
另请阅读 http：// c -faq.com/ 相关章节。指针与数组部分特别有用。
No. You don''t have to cast malloc, and you probably don''t want to, as it doesn''t help but can hurt. Unless you want to compile under C++, C will implicitly do the cast.
krreks, you wouldn''t write val1++. You can index it, such as val1[2]. You essentially have an array (dynamically allocated), and you can index that array, right? Think about arrays.
Also read http://c-faq.com/ on the relevant sections. The pointers vs. arrays section is particularly helpful.
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