c - 在字符串中搜索字符串

Question

我有:"ETSGYU-deDEGUw<div>TOTO/$$/hfuiehfurei"我想在"<div>"之后获得链条和之前"/$$/"然后:"TOTO"

int main (int argc, char* argv[])
    {
    char IN[1000];
    char OUT[1000];
    strcpy(IN,"ETSGYU-deDEGUw<div>TOTO/$$/hfuiehfurei");

    ...

    printf("%s\n",OUT);
    }

致以诚挚的问候

Answer 1

使用strstr() @pm100 .

为了不向您提供所有代码，请使用以下大纲。 OP 仍然需要确定 4 个 ... 部分。

int main(int argc, char* argv[]) {
  char IN[1000];
  //char OUT[1000];
  strcpy(IN, "ETSGYU-deDEGUw<div>TOTO/$$/hfuiehfurei");
  const char *pattern1 = "<div>";
  const char *pattern2 = "/$$/";
  char *start = strstr(IN, pattern1);
  if (start) {

    // Increase `start` by the length of `pattern1`
    start += ...;

    // Search again, this time for pattern2.  From where should searching start?
    char *end = ...;

    if (end) {

      // print from start.  Only need to print some of the characters
      int length = ...
      printf("%.*s\n", ...);

      return 0;
    }
  }
  puts("Fail");
  return -1;
}