View Compilation Error

0_0_29149051_20384.cpp:158:2: error: missing terminating ' character
  while (ch >= '0
  ^
0_0_29149051_20384.cpp: In function 'int read()':
0_0_29149051_20384.cpp:158:12: error: expected primary-expression at end of input
  while (ch >= '0
            ^
0_0_29149051_20384.cpp:158:12: error: expected ')' at end of input
0_0_29149051_20384.cpp:158:12: error: expected statement at end of input
0_0_29149051_20384.cpp:158:12: error: expected '}' at end of input