Compilare: user.cpp: In function ‘int main()’: user.cpp:8:13: warning: unused variable ‘j’ [-Wunused-variable] int n,i,j,lmin,lmax,k,x,s,v,elem; ^ user.cpp:9:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&k); ^ user.cpp:13:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&a[i]); ^