我已经尝试了几个小时来转换它。我尝试循环遍历将字符转换为长整数的数组,但这不起作用。我在网上看到过简单的例子,但它们没有涵盖更长的 char 数组的循环过程。我可以使用什么方法将这个 char (SAMPLE) 数组转换为一个 long 类型的变量?
ar.h
struct ar_hdr /* file member header */
{
char ar_name[16]; /* '/' terminated file member name */
char ar_date[12]; /* file member date */
char ar_uid[6] /* file member user identification */
char ar_gid[6] /* file member group identification */
char ar_mode[8] /* file member mode (octal) */
char ar_size[10]; /* file member size */
char ar_fmag[2]; /* header trailer string */
};
我的代码
struct ar_hdr sample;
lseek(fileD, 24, SEEK_SET); //fileD is the file desriptor for the opened archive
//I start at 24 because of the 8 byte magic string for an archive starts the file "!<arch>\n"
int numRead = read(fileD, sample.ar_date, 12);
printf(sample.ar_date);
long epoch = (long *) *sample.ar_date; //terrible coding here
printf("The current time is: %s\n", asctime(gmtime(&epoch)));