Compilare: user.cpp: In function ‘int main()’: user.cpp:10:25: warning: unused variable ‘st’ [-Wunused-variable] int n,m,i,cer,a,b,k,st,dr; ^ user.cpp:10:28: warning: unused variable ‘dr’ [-Wunused-variable] int n,m,i,cer,a,b,k,st,dr; ^ user.cpp:11:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&m); ^ user.cpp:13:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^ user.cpp:15:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d%d",&cer,&a,&b,&k); ^