Compilare: user.cpp: In function ‘int main()’: user.cpp:10:23: warning: unused variable ‘div’ [-Wunused-variable] long long s=n+1,x=2,div=2; ^ user.cpp:6:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%u",&t); ^ user.cpp:9:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&n); ^