View Compilation Error

0_0_18545956_18569.cpp: In function 'void charsum()':
0_0_18545956_18569.cpp:37:52: error: expected primary-expression at end of input
      if (a[i - 1] >= '0' && a[i - 1] <= '9' && b[j - 
                                                    ^
0_0_18545956_18569.cpp:37:52: error: expected ']' at end of input
0_0_18545956_18569.cpp:37:52: error: expected ')' at end of input
0_0_18545956_18569.cpp:37:52: error: expected statement at end of input
0_0_18545956_18569.cpp:37:52: error: expected '}' at end of input
0_0_18545956_18569.cpp:37:52: error: expected '}' at end of input
0_0_18545956_18569.cpp:37:52: error: expected '}' at end of input
0_0_18545956_18569.cpp:37:52: error: expected '}' at end of input
0_0_18545956_18569.cpp:37:52: error: expected '}' at end of input