Compilare: main.cpp: In function 'std::vector<int> mult(std::vector<int>, std::vector<int>)': main.cpp:62:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<A.size();i++) x[i] = cd(A[i], 0); ~^~~~~~~~~ main.cpp:63:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<B.size();i++) y[i] = cd(B[i], 0); ~^~~~~~~~~ main.cpp:66:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<z.size();i++) z[i] = x[i] * y[i]; ~^~~~~~~~~ main.cpp:71:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<C.size();i++) C[i] = z[i].real() + 0.5; ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:96:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<c.size();i++) if (c[i]) cout << i << ' ' << c[i] << '\n'; ~^~~~~~~~~ main.cpp:80:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.in","r",stdin); ^ main.cpp:81:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.out","w",stdout); ^