Question

I am trying to delete .txt extension from filename that is written in string “mat”:

sscanf(mat, "%s.txt", ime_datoteke);

If mat="sm04567890.txt" I want that ime_datoteke="sm04567890".
As in example I tried using sscanf, but it doesnt work (it copies mat to ime_datoteke).

How can I do it in C?

Answer 1

You could modify your sscanf approach slightly to read a string that does not include a .:

sscanf(mat, "%[^.].txt", ime_datoteke);

However, it would be best if you look for the . character from the end of the string, and then copy the substring determined by it.

char* dot = strrchr(mat, '.');
strncpy(ime_datoteke, mat, dot - mat);