View Compilation Error

0_0_34686797_16350.cpp: In function 'int main()':
0_0_34686797_16350.cpp:13:26: error: expected ')' before ';' token
           for(a=0;a<b;a++;b--)
                          ^
0_0_34686797_16350.cpp:13:30: error: expected ';' before ')' token
           for(a=0;a<b;a++;b--)
                              ^