Compilare: user.cpp: In function ‘short int sum(int, int, int)’: user.cpp:15:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(s==nr) ^ user.cpp:17:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(s<nr) return 2; ^ user.cpp: In function ‘int main()’: user.cpp:12:31: warning: ‘poz2’ may be used uninitialized in this function [-Wmaybe-uninitialized] s=(unsigned long long)poz2*(poz2+1)/2; ^ user.cpp:25:16: note: ‘poz2’ was declared here int i,poz1,poz2; ^