View Compilation Error

0_0_32671718_25815.cpp: In function 'int main()':
0_0_32671718_25815.cpp:71:7: error: 'cout' was not declared in this scope
       cout<<a[i]<<" ";
       ^
0_0_32671718_25815.cpp:73:4: error: 'cout' was not declared in this scope
    cout>>endl;
    ^
0_0_32671718_25815.cpp:73:10: error: 'endl' was not declared in this scope
    cout>>endl;
          ^