View Compilation Error

0_0_19512570_6957.cpp: In function 'int main()':
0_0_19512570_6957.cpp:38:5: error: 'cin' was not declared in this scope
     cin >> L;
     ^
0_0_19512570_6957.cpp:80:13: error: 'cout' was not declared in this scope
             cout << setw(4) << i << "  " << text[i] << endl;
             ^
0_0_19512570_6957.cpp:80:56: error: 'endl' was not declared in this scope
             cout << setw(4) << i << "  " << text[i] << endl;
                                                        ^
0_0_19512570_6957.cpp:83:13: error: 'cout' was not declared in this scope
             cout << "Pattern not found" << endl;
             ^
0_0_19512570_6957.cpp:83:44: error: 'endl' was not declared in this scope
             cout << "Pattern not found" << endl;
                                            ^
0_0_19512570_6957.cpp:84:9: error: 'cout' was not declared in this scope
         cout << endl;
         ^
0_0_19512570_6957.cpp:84:17: error: 'endl' was not declared in this scope
         cout << endl;
                 ^