View Compilation Error

0_0_34739254_23407.cpp:12:10: error: #include expects "FILENAME" or <FILENAME>
 #include 
          ^
0_0_34739254_23407.cpp: In function 'int main()':
0_0_34739254_23407.cpp:14:5: error: redefinition of 'int main()'
 int main() {
     ^
0_0_34739254_23407.cpp:2:5: note: 'int main()' previously defined here
 int main()
     ^
0_0_34739254_23407.cpp:16:7: error: 'cin' was not declared in this scope
 while(cin >> a >> b) {
       ^
0_0_34739254_23407.cpp:17:1: error: 'cout' was not declared in this scope
 cout << a + b << endl;
 ^
0_0_34739254_23407.cpp:17:18: error: 'endl' was not declared in this scope
 cout << a + b << endl;
                  ^