View Compilation Error

0_0_28865188_9923.cpp: In function 'int main()':
0_0_28865188_9923.cpp:59:13: error: 'cout' was not declared in this scope
             cout<<sum[i]<<endl;
             ^
0_0_28865188_9923.cpp:59:27: error: 'endl' was not declared in this scope
             cout<<sum[i]<<endl;
                           ^