Compilare: user.cpp: In function ‘int ciur(const int&)’: user.cpp:34:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( register int i = 1; i < primes.size( ); ++i ) { ^ user.cpp:16:9: warning: unused variable ‘count’ [-Wunused-variable] int count = 1, s = 2, n = 3; ^ user.cpp:46:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:70:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d", &a, &b ); ^