How to Compare Last n Characters of A String to Another String in C

Question

Imagine that I have two strings, one of them is a url like \"/sdcard/test.avi\" and the other one is\"/sdcard/test.mkv\". I want to write an if statement that looks whether

Answer 1

If you have a pointer-to-char array, str, then this:

int len = strlen(str);
const char *last_four = &str[len-4];

will give you a pointer to the last four characters of the string. You can then use strcmp(). Note that you'll need to cope with the case where (len < 4), in which case the above won't be valid.