Compilare: user.cpp: In function ‘int main()’: user.cpp:12:9: warning: unused variable ‘nr’ [-Wunused-variable] int nr, nr1; ^ user.cpp:12:13: warning: unused variable ‘nr1’ [-Wunused-variable] int nr, nr1; ^ 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]); ^