View Compilation Error

0_0_37602343_24551.cpp:10:17: error: empty character constant
         cin>>num''
                 ^
0_0_37602343_24551.cpp: In function 'int main()':
0_0_37602343_24551.cpp:10:17: error: expected ';' before '\x0'
0_0_37602343_24551.cpp:14:13: error: 'ans' was not declared in this scope
             ans+=num/5;
             ^
0_0_37602343_24551.cpp:17:15: error: 'ans' was not declared in this scope
         cout<<ans<<endl;
               ^