View Compilation Error

0_0_32470588_7361.cpp: In function 'void tree(int*, int*, int)':
0_0_32470588_7361.cpp:13:8: error: 'cnt' was not declared in this scope
     if(cnt!=0) cout<<" ";
        ^
0_0_32470588_7361.cpp:14:5: error: 'cnt' was not declared in this scope
     cnt++;
     ^