Compilare: user.cpp: In function ‘int main()’: user.cpp:10:13: warning: unused variable ‘q’ [-Wunused-variable] int i,j,q,w,e,mn,mx; ^ user.cpp:13:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&k); ^ user.cpp:16:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x[i]); ^ user.cpp:30:19: warning: ‘e’ may be used uninitialized in this function [-Wmaybe-uninitialized] a[e]+=x[i]; ^