运行 ID: 6211

Main.cc: In function ‘int main()’:
Main.cc:5:5: error: ‘cin’ was not declared in this scope
     cin>>a;
     ^~~
Main.cc:5:5: note: ‘std::cin’ is defined in header ‘’; did you forget to ‘#include ’?
Main.cc:1:1:
+#include 
 using namespace std;
Main.cc:5:5:
     cin>>a;
     ^~~
Main.cc:7:5: error: ‘cout’ was not declared in this scope
     cout<<"yes"<’; did you forget to ‘#include ’?
Main.cc:7:18: error: ‘endl’ was not declared in this scope
     cout<<"yes"<’; did you forget to ‘#include ’?
Main.cc:1:1:
+#include 
 using namespace std;
Main.cc:7:18:
     cout<<"yes"<