View Compilation Error

0_0_29210697_15588.cpp: In function 'int main()':
0_0_29210697_15588.cpp:12:54: error: expected unqualified-id at end of input
 for (int i=0; i<lena; i++)na[lena-1-i]=a[i]-'0';for (int 
                                                      ^
0_0_29210697_15588.cpp:12:54: error: expected ';' at end of input
0_0_29210697_15588.cpp:12:54: error: expected primary-expression at end of input
0_0_29210697_15588.cpp:12:54: error: expected ';' at end of input
0_0_29210697_15588.cpp:12:54: error: expected primary-expression at end of input
0_0_29210697_15588.cpp:12:54: error: expected ')' at end of input
0_0_29210697_15588.cpp:12:54: error: expected statement at end of input
0_0_29210697_15588.cpp:12:54: error: expected '}' at end of input
0_0_29210697_15588.cpp:12:54: error: expected '}' at end of input