View Compilation Error

0_0_27875133_19511.cpp: In function 'int main()':
0_0_27875133_19511.cpp:9:4: error: 'cin' was not declared in this scope
    cin>>T;
    ^
0_0_27875133_19511.cpp:12:27: error: 'memset' was not declared in this scope
       memset(a,0,sizeof(a));
                           ^
0_0_27875133_19511.cpp:29:20: error: 'cout' was not declared in this scope
     if(n==2||m==0) cout<<"1/1"<<endl;
                    ^
0_0_27875133_19511.cpp:29:33: error: 'endl' was not declared in this scope
     if(n==2||m==0) cout<<"1/1"<<endl;
                                 ^
0_0_27875133_19511.cpp:32:7: error: 'cout' was not declared in this scope
       cout<<p/k<<"/"<<q/k<<endl;
       ^
0_0_27875133_19511.cpp:32:28: error: 'endl' was not declared in this scope
       cout<<p/k<<"/"<<q/k<<endl;
                            ^