Compilare: user.cpp: In function ‘int main()’: user.cpp:23:18: warning: variable ‘r’ set but not used [-Wunused-but-set-variable] unsigned l,c,r,p2; ^ user.cpp:23:20: warning: variable ‘p2’ set but not used [-Wunused-but-set-variable] unsigned l,c,r,p2; ^ user.cpp:25:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%u%u",&l,&c); ^