Кто знает что здесь не так

# include <iostream>
using namespace std;
int main()
{
    unsigned char y;
    cout<<"Yak vas zvatu?"<<endl;
    cin>>y;
    int a;
    cout<<"Skilku vam rokiv?"<<endl;
    cin>>a;
    if(1<=a&&a<=10) cout<<y<<endl<<"Dutuna"<<endl;
    if(11<=a&&a<=15) cout<<y<<endl<<"Pidlitok"<<endl;
    if(16<=a&&a<=20) cout<<y<<endl<<"Yunak"<<endl;
    if(21<=a&&a<=30) cout<<y<<endl<<"Moloda lyuduna"<<endl;
    if(31<=a) cout<<y<<endl<<"Dorosla lyuduna"<<endl;
    return 0;}

char y[100];

# include <iostream>
# include <string>
 
int main()
{
    std::string name;
    std::cout<<"Yak vas zvatu?"<<std::endl;
    std::cin>>name;
    int years;
    std::cout<<"Skilku vam rokiv?"<<std::endl;
    std::cin>>years;
    if(1 <= years && years <=10)
        std::cout<<name<<std::endl<<"Dutuna"<<std::endl;
    if(11 <=years && years <=15) 
        std::cout<<name<<std::endl<<"Pidlitok"<<std::endl;
    if(16 <= years && years<=20) 
        std::cout<<name<<std::endl<<"Yunak"<<std::endl;
    if(21 <= years && years <=30) 
        std::cout<<name<<std::endl<<"Moloda lyuduna"<<std::endl;
    if(31 <= years) 
        std::cout<<name<<std::endl<<"Dorosla lyuduna"<<std::endl;
    system("pause");
    return 0;
}