Compilare: user.cpp: In function ‘void BF(int)’: user.cpp:22:9: warning: unused variable ‘j’ [-Wunused-variable] int j,ss=0,p=1,u=1; ^ user.cpp: In function ‘int main()’: user.cpp:54:6: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] nod *p; ^ user.cpp:44:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&n,&m,&s); ^ user.cpp:48:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&x,&y); ^