View Compilation Error

0_0_32979134_22781.cpp: In function 'int main()':
0_0_32979134_22781.cpp:17:19: error: 'input_ch' was not declared in this scope
             cout<<input_ch<<endl;
                   ^
0_0_32979134_22781.cpp:26:31: error: 'input_ch' was not declared in this scope
                         cout<<input_ch;
                               ^
0_0_32979134_22781.cpp:36:23: error: 'input_ch' was not declared in this scope
                 cout<<input_ch;
                       ^