Compilare: user.cpp: In function ‘int main()’: user.cpp:9:11: warning: variable ‘pp’ set but not used [-Wunused-but-set-variable] int n,pp,nrc,j,i,e1,e2; ^ user.cpp:9:14: warning: variable ‘nrc’ set but not used [-Wunused-but-set-variable] int n,pp,nrc,j,i,e1,e2; ^ user.cpp:10:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^