View Compilation Error

0_0_16961994_14362.cpp: In function 'int main()':
0_0_16961994_14362.cpp:18:9: error: 'insum' was not declared in this scope
         insum=0;
         ^
0_0_16961994_14362.cpp:22:13: error: 'sum' was not declared in this scope
             sum+=(a[i]-'0')%(B-1);
             ^
0_0_16961994_14362.cpp:25:23: error: 'sum' was not declared in this scope
         cout<<i<<" "<<sum<<endl;
                       ^