黃宇綸

1. #include<bits/stdc++.h>
   
2. using namespace std;
   
3. #define ll long long
   
4. //#define int ll
   
5. #define FOR(i,a,b) for(int i=a;i<b;i++)
   
6. #define REP(i,n) FOR(i,0,n)
   
7. #define REP1(i,n) FOR(i,1,(n)+1)
   
8. #define RREP(i,n) for(int i=(n)-1;i>=0;i--)
   
9. #define f first
   
10. #define s second
    
11. #define pb push_back
    
12. #define ALL(x) x.begin(),x.end()
    
13. #define SZ(x) (int)(x.size())
    
14. #define SQ(x) (x)*(x)
    
15. #define pii pair<int,int>
    
16. #define Graph vector<vector<int>>
    
17. #define IOS() cin.sync_with_stdio(0),cin.tie(0),cout.tie(0)
    
18. const ll inf=(1ll<<63)-1;
    
19. const int maxn=1e4+5;
    
20. const ll mod=1e9+7;
    
21. stringstream ss;
    
22. signed main()
    
23. {
    
24.     IOS();
    
25.     int a=123;
    
26.     double b=456.789;
    
27.     float c;
    
28.     string d;
    
29.     ss<<a;
    
30.     ss>>c;
    
31.     cout<<c<<endl;
    
32.     ss.str("");
    
33.     ss.clear();
    
34.     ss<<b;
    
35.     ss>>d;
    
36.     cout<<d<<endl;
    
37.     cout<<typeid(a).name()<<endl;
    
38.     cout<<typeid(b).name()<<endl;
    
39.     cout<<typeid(c).name()<<endl;
    
40.     cout<<typeid(d).name()<<endl;
    
41.     return 0;
    
42. }

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