Compilare: user.cpp: In function ‘int main()’: user.cpp:42:9: warning: variable ‘n’ set but not used [-Wunused-but-set-variable] int n, q, mlc, e, x, y; ^ user.cpp: In function ‘char nextch()’: user.cpp:11:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, pos, 1, fin); ^