简单

#include<bits/stdc++.h>
using namespace std;
//用一个字符串记录9个数的英文
string a[10]={"one","two","three","four","five","six","seven","eight","nine"};
int main(){
int n;
cin>>n;
if(n<1||n>9) cout<<"-1";
else cout<<a[n-1];
return 0;
}

#include<bits/stdc++.h> 
using namespace std; 
int main(){ 
int n; 
cin>>n; 
if(n==1){ 
cout<<"one"; 
}
else if(n==2){ 
cout<<"two"; 
}
else if(n==3){ 
cout<<"three"; 
}
else if(n==4){ 
cout<<"four"; 
}
else if(n==5){ 
cout<<"five"; 
}
else if(n==6){ 
cout<<"six"; 
}
else if(n==7){ 
cout<<"seven"; 
}
else if(n==8){ 
cout<<"eight"; 
}
else if(n==9){ 
cout<<"nine"; 
}
else { 
cout<<"out"; 
} 
return 0; 
}

#include<bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; if(n1){ cout<<"one"; }else if(n2){ cout<<"two"; }else if(n3){ cout<<"three"; }else if(n4){ cout<<"four"; }else if(n5){ cout<<"five"; }else if(n6){ cout<<"six"; }else if(n7){ cout<<"seven"; }else if(n8){ cout<<"eight"; }else if(n==9){ cout<<"nine"; }else { cout<<"out"; } return 0; }