在C / C ++中读取字节方法 [英] Read bytes methods in C / C++
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问题描述
我是新的C,我想知道是否有标准库方法读取bytes / int / long
如:getChar(),getInt(),getLong()。
I am new to C and i was wondering if there are standard library methods to read bytes/int/long such as: getChar(), getInt(), getLong().
例如,如果我调用getInt(),它将返回4个字节作为字符串,并将char指针地址移动4.在哪里可以找到这些方法?
So for instance if i call getInt(), it will return the 4 bytes as a string and move the char pointer address by 4. Where can i find these methods?
推荐答案
由于指针运算属于C本质,所以类似Java的函数在那里不可用。
Since pointer arithmetic is in the very nature of C, such Java-like functions are not available there.
要得到 int
,你可以这样做:
To get an int
out of some memory buffer you would do:
/* assuming that buf is of type void * */
int x = *((int *) buf);
/* advance to the position after the end of the int */
((int *) buf)++;
或更紧凑:
int x = *((int *) buf)++;
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