View Compilation Error

0_0_31583790_32301.cpp: In function 'int main()':
0_0_31583790_32301.cpp:40:8: error: 'c' was not declared in this scope
  while(c
        ^
0_0_31583790_32301.cpp:40:8: error: expected ')' at end of input
0_0_31583790_32301.cpp:40:8: error: expected statement at end of input
0_0_31583790_32301.cpp:40:8: error: expected '}' at end of input