Compilare: user.cpp: In function ‘int main()’: user.cpp:8:11: warning: unused variable ‘k’ [-Wunused-variable] int n,k,i,l,q,w,b,j,r,d,s; ^ user.cpp:8:15: warning: unused variable ‘l’ [-Wunused-variable] int n,k,i,l,q,w,b,j,r,d,s; ^ user.cpp:8:25: warning: unused variable ‘r’ [-Wunused-variable] int n,k,i,l,q,w,b,j,r,d,s; ^ user.cpp:8:27: warning: unused variable ‘d’ [-Wunused-variable] int n,k,i,l,q,w,b,j,r,d,s; ^ user.cpp:11:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:15:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d ",&a[i]); ^