View Compilation Error

0_0_34686835_31272.cpp: In function 'int main()':
0_0_34686835_31272.cpp:13:23: error: expected ')' before ';' token
           for(;a=0;a<b;a++;b--)
                       ^
0_0_34686835_31272.cpp:13:31: error: expected ';' before ')' token
           for(;a=0;a<b;a++;b--)
                               ^