Compilare: user.cpp: In function ‘int main()’: user.cpp:12:41: warning: variable ‘vf2’ set but not used [-Wunused-but-set-variable] int k1,k=0,cost,costinit=0,n,i,vf=0,vf2; ^ user.cpp:16:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:18:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^