是否有内置函数来获取 strsep() 的后半部分？

Question

简而言之，目前下面的代码输出：The substring is AES。不幸的是，我正在寻找结果 The substring is 100。这是因为 strsep() 只保留拆分的第一部分，而不保留第二部分。有没有办法让第二部分成为保留的部分？

#include <stdio.h>
#include <string.h>

int main () {
   const char haystack[50] = "SHA1 = 99\nAES = 100";
   const char needle[10] = "Point";
   char *ret;
   char *bonus;
   ret = strstr(haystack, "AES");

   bonus = strsep(&ret, "=");

   printf("The substring is: %s\n", bonus);

   return(0);
}

Answer 1

来自 strsep function's documentation :

char *strsep(char **stringp, const char *delim);
If *stringp is NULL, the strsep() function returns NULL and does nothing else. Otherwise, this function finds the first token in the string *stringp, that is delimited by one of the bytes in the string delim. This token is terminated by overwriting the delimiter with a null byte ('[=18=]'), and *stringp is updated to point past the token. In case no delimiter was found, the token is taken to be the entire string *stringp, and *stringp is made NULL.

所以在你的程序中你应该打印 ret 而不是 bonus:

bonus = strsep(&ret, "=");

printf("The substring is: %s\n", ret);

因为 ret 将指向令牌 "="。

是否有内置函数来获取 strsep() 的后半部分？

Is there a built in function to get the back half of a strsep()?

c

substring

strsep