View Compilation Error

0_0_36384551_20284.cpp: In function 'int main()':
0_0_36384551_20284.cpp:5:8: error: 'scan' was not declared in this scope
  while(scan
        ^
0_0_36384551_20284.cpp:5:8: error: expected ')' at end of input
0_0_36384551_20284.cpp:5:8: error: expected statement at end of input
0_0_36384551_20284.cpp:5:8: error: expected '}' at end of input