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View Compilation Error

0_0_38872437_27872.cpp: In function 'int main()':
0_0_38872437_27872.cpp:4:15: error: 'cin' was not declared in this scope
    4 |         for (;cin >> n;)
      |               ^~~
0_0_38872437_27872.cpp:11:17: error: 'cout' was not declared in this scope
   11 |                 cout<<"sum= "<<sum <<endl;
      |                 ^~~~
0_0_38872437_27872.cpp:11:38: error: 'endl' was not declared in this scope
   11 |                 cout<<"sum= "<<sum <<endl;
      |                                      ^~~~


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