View Compilation Error

0_0_19824589_27421.cpp: In function 'int main()':
0_0_19824589_27421.cpp:21:21: error: 'cal' was not declared in this scope
     int x=cal(b^A[j]),sum=0;
                     ^
0_0_19824589_27421.cpp:22:27: error: 'sum' was not declared in this scope
     for(;x;x>>=1) if(x&1) sum++;  
                           ^
0_0_19824589_27421.cpp:23:8: error: 'sum' was not declared in this scope
     if(sum<Min||(sum==Min&&A[j]<A[a]))
        ^