Compilare: main.cpp: In function 'int main()': main.cpp:26:23: warning: unused variable 'x' [-Wunused-variable] long long n,d,sum,x; ^ main.cpp:27:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld",&n); ^ main.cpp:28:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%lld",&k); ^