Compilare: user.cpp: In function ‘int main()’: user.cpp:88:15: warning: unused variable ‘rr’ [-Wunused-variable] long long rr; ^ user.cpp:48:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d\n",&n); ^ user.cpp:53:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%c %d",&c,&x); ^