View Compilation Error

0_0_17094216_14386.cpp: In function 'bool bfs()':
0_0_17094216_14386.cpp:36:14: error: 'i' was not declared in this scope
          for(i=0;i<8;i++)
              ^
0_0_17094216_14386.cpp:49:18: error: 'flag' was not declared in this scope
                  flag=1;
                  ^