3124. Word list

3124. Word list

#include <iostream>
#include <set>
using namespace std;
int main() {
    
    int n;
    cin>>n;
    getchar();  				//3 The following newline character 
    for(int i=0;i<n;i++){
       
        string s,t;           //t Save words 
        set<string> st;
        getline(cin,s);
        for(int j=0;j<s.length();j++){
    
            if(isalpha(s[j])){
            //s[j] If it is a letter, continue to add 
                t+=s[j];
            }
            if(!isalpha(s[j])||j==s.length()-1){
    
                if(t.length()!=0) st.insert(t);         //t Insert only if it is not empty 
                t="";                                // One word input ends , empty 
            }
        }
        cout<<"case #"<<i<<":"<<endl;
        for(auto it=st.begin();it!=st.end();it++){
    
            if(it==st.begin())cout<<*it;
            else cout<<" "<<*it;
        }
        cout<<endl;
    }
    return 0;
}