Compilare: user.cpp: In member function ‘numar numar::operator+(const numar&) const’: user.cpp:13:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size() || i<aux.v.size();i++) ^ user.cpp:13:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size() || i<aux.v.size();i++) ^ user.cpp:15:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<v.size()) s+=v[i]; ^ user.cpp:16:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<aux.v.size()) s+=aux.v[i]; ^ user.cpp: In function ‘std::pair<int, numar> aduna1(numar, numar)’: user.cpp:44:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.v.size();i++) ^ user.cpp:47:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz1=0,poz2=b.v.size()-i-1;poz2<b.v.size();poz1++,poz2++) ^ user.cpp:52:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<b.v.size()-i-1;j++) ^ user.cpp:57:62: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int poz1=0,poz2=b.v.size()-i-1;poz2<b.v.size();poz1++,poz2++) ^ user.cpp:63:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+1;j<a.v.size();j++) a1.v.push_back(a.v[j]); ^ user.cpp: In function ‘int main()’: user.cpp:102:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plus2.in","r",stdin); ^ user.cpp:103:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("plus2.out","w",stdout); ^ user.cpp:105:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:108:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^