View Compilation Error

0_0_22979421_28980.cpp: In function 'bool check()':
0_0_22979421_28980.cpp:29:12: error: 'i' was not declared in this scope
         if(i*i*i==k)
            ^
0_0_22979421_28980.cpp:35:12: error: 'i' was not declared in this scope
         if(i*i*i==k*k)
            ^