Question

How to find the length of the string which also contains string terminating character in between. Example: ABC\0ABC. Is there any inbuilt function present which returns the length?

If the Input string is: ABC\0ABC
Output: 8

Answer 1

Since the end of a C-style string is only detectable because it ends in a '\0' character, what you’re asking isn’t solvable in a general way. If, like in your example, you know there’s exactly one '\0' character in the string, then you can simply do:

x =  strlen(string);             // length of string before the first '\0'
x += strlen(string + x + 1) + 1; // plus the length of the string after
                                 // the first '\0' plus the '\0' itself.