Compilare: user.cpp: In function ‘void cclear()’: user.cpp:146:32: warning: suggest parentheses around assignment used as truth value [-Wparentheses] trecut[i] = trecut2[i] = sub[i] = tata[i] = first[i] = last[i] = trecut3[i] = 0; ^ user.cpp: In function ‘int main()’: user.cpp:187:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for0(i, euler.size()) ^ user.cpp:2:34: note: in definition of macro ‘for0’ #define for0(i,n) for(int i=0; i<n; i++) ^