Eroare de compilare: user.cpp:1:9: warning: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wliteral-suffix] #include<fstream>using namespace std;ifstream cin("submultimi.in");ofstream cout("submultimi.out");int n,i=1,v[30];int main(){    cin>>n;    while(v[n+1]==0)    {        for(i=1;i<=n+1;i++)        {            if(v[i]==1)            {                v[i]=0;            }            else            {                v[i]=1;                break;            }        }        if(v[n+1]==0)        {            for(i=1;i<=n;i++)                 if(v[i]==1)                    cout<<i<<" ";            cout<<"\n";        }    }    return 0;} ^ user.cpp:1:18: warning: extra tokens at end of #include directive [enabled by default] #include<fstream>using namespace std;ifstream cin("submultimi.in");ofstream cout("submultimi.out");int n,i=1,v[30];int main(){    cin>>n;    while(v[n+1]==0)    {        for(i=1;i<=n+1;i++)        {            if(v[i]==1)            {                v[i]=0;            }            else            {                v[i]=1;                break;            }        }        if(v[n+1]==0)        {            for(i=1;i<=n;i++)                 if(v[i]==1)                    cout<<i<<" ";            cout<<"\n";        }    }    return 0;} ^ /usr/lib/crt1.o: In function `_start': (.text+0x18): undefined reference to `main' collect2: error: ld returned 1 exit status