Compilare: user.cpp: In function ‘int main()’: user.cpp:107:17: warning: unused variable ‘rc’ [-Wunused-variable] int rc = Ancestor(i, v[i]); ^ user.cpp: In function ‘char next_poz()’: user.cpp:28:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, Size, in); ^ user.cpp: In function ‘int Ancestor(int, int)’: user.cpp:69:1: warning: control reaches end of non-void function [-Wreturn-type] } ^