Compilare: user.cpp: In function ‘int main()’: user.cpp:47:22: warning: variable ‘r’ set but not used [-Wunused-but-set-variable] int i,n,m,nh,s,d,r,x; ^ user.cpp:50:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&m); ^ user.cpp:55:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&s,&d); ^