View Compilation Error

0_0_37383723_12556.cpp: In function 'int main()':
0_0_37383723_12556.cpp:9:9: error: 'string' was not declared in this scope
         string str;
         ^
0_0_37383723_12556.cpp:10:9: error: 'cin' was not declared in this scope
         cin.get();
         ^
0_0_37383723_12556.cpp:11:14: error: 'str' was not declared in this scope
         cin>>str;
              ^
0_0_37383723_12556.cpp:22:9: error: 'cout' was not declared in this scope
         cout<<m1<<","<<m2<<endl;
         ^
0_0_37383723_12556.cpp:22:28: error: 'endl' was not declared in this scope
         cout<<m1<<","<<m2<<endl;
                            ^