Compilare: user.cpp: In function ‘int main()’: user.cpp:11:13: warning: unused variable ‘elem’ [-Wunused-variable] int n,i,elem,poz; ^ user.cpp:11:18: warning: unused variable ‘poz’ [-Wunused-variable] int n,i,elem,poz; ^ user.cpp:12:20: warning: unused variable ‘sol2’ [-Wunused-variable] long long sol1,sol2; ^ user.cpp:13:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:15:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&w[i]); ^