View Compilation Error

0_0_17969485_3435.cpp: In function 'int main()':
0_0_17969485_3435.cpp:44:29: error: 'putchear' was not declared in this scope
                 putchear('1');
                             ^
0_0_17969485_3435.cpp:46:29: error: 'putchear' was not declared in this scope
                 putchear('0');
                             ^