View Compilation Error

0_0_30175713_23615.cpp: In function 'int main()':
0_0_30175713_23615.cpp:34:4: error: 'cout' was not declared in this scope
    cout<<0<<endl;
    ^
0_0_30175713_23615.cpp:34:13: error: 'endl' was not declared in this scope
    cout<<0<<endl;
             ^
0_0_30175713_23615.cpp:49:3: error: 'cout' was not declared in this scope
   cout<<m<<endl;
   ^
0_0_30175713_23615.cpp:49:12: error: 'endl' was not declared in this scope
   cout<<m<<endl;
            ^