Get a substring of a char

Question

For example  I have this  char  buff    this is a test string     and want to get  test   How can I do that

User · Answer

Assuming you know the position and the length of the substring:

char *buff = "this is a test string";
printf("%.*s", 4, buff + 10);

You could achieve the same thing by copying the substring to another memory destination, but it's not reasonable since you already have it in memory.

This is a good example of avoiding unnecessary copying by using pointers.

User · Answer

You can use strstr  Example code here   Note that the returned result is not null terminated

User · Answer

char subbuff 5   memcpy  subbuff   amp buff 10   4    subbuff 4      0     Job done

User · Answer

You can just use strstr   from  lt string h gt     man strstr

User · Answer

Use char  strncpy char  dest  char  src  int n  from  lt cstring gt   In your case you will need to use the following code   char  substr   malloc 4   strncpy substr  buff 10  4     Full documentation on the strncpy function here

[c] Get a substring of a char*

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