View Compilation Error

0_0_30644765_30178.cpp: In function 'int main()':
0_0_30644765_30178.cpp:15:25: error: 'max_height' was not declared in this scope
             if(height > max_height)
                         ^
0_0_30644765_30178.cpp:18:25: error: 'max_height' was not declared in this scope
         printf("%.2f\n",max_height);
                         ^