Compilare: main.cpp: In function 'int main()': main.cpp:29:25: warning: unused variable 'nr_term' [-Wunused-variable] long long i,d,a,b,j,nr_term; ^~~~~~~ main.cpp:30:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld",&n,&d); ^ main.cpp:32:37: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld",&a,&b); ^