View Compilation Error

0_0_31762076_22131.cpp: In function 'int main()':
0_0_31762076_22131.cpp:5:4: error: 'a0' was not declared in this scope
 if(a0&&b0) break;
    ^
0_0_31762076_22131.cpp:5:8: error: 'b0' was not declared in this scope
 if(a0&&b0) break;
        ^
0_0_31762076_22131.cpp:9:5: error: 'ansa' was not declared in this scope
 ans=ansa;//累乘
     ^
0_0_31762076_22131.cpp:13:3: error: 'aa' was not declared in this scope
 a=aa;
   ^