Compilare: user.cpp: In function ‘void solve()’: user.cpp:58:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < st.size()-1; i++) ^ user.cpp:59:34: warning: format ‘%lf’ expects argument of type ‘double’, but argument 2 has type ‘__gnu_cxx::__alloc_traits<std::allocator<punct> >::value_type {aka punct}’ [-Wformat=] printf("%lf %lf\n", st[i]); ^ user.cpp:59:34: warning: format ‘%lf’ expects a matching ‘double’ argument [-Wformat=] user.cpp:60:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < st2.size()-1; j++) ^ user.cpp:61:35: warning: format ‘%lf’ expects argument of type ‘double’, but argument 2 has type ‘__gnu_cxx::__alloc_traits<std::allocator<punct> >::value_type {aka punct}’ [-Wformat=] printf("%lf %lf\n", st2[j]); ^ user.cpp:61:35: warning: format ‘%lf’ expects a matching ‘double’ argument [-Wformat=] user.cpp: In function ‘void citire()’: user.cpp:26:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:29:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf", &a[i].x, &a[i].y); ^ user.cpp: In function ‘int main()’: user.cpp:66:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.in", "r", stdin); ^ user.cpp:67:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.out", "w", stdout); ^