View Compilation Error

0_0_27857361_1469.cpp: In function 'bool cmp(Cube, Cube)':
0_0_27857361_1469.cpp:12:10: error: 'struct Cube' has no member named 'area'
     if(a.area==b.area)
          ^
0_0_27857361_1469.cpp:12:18: error: 'struct Cube' has no member named 'area'
     if(a.area==b.area)
                  ^