/in/foo.cc: In function 'int main()':
/in/foo.cc:13:15: warning: left operand of comma operator has no effect [-Wunused-value]
  for(int b=0;b<n,b++){
              ~^~
/in/foo.cc:13:21: error: expected ';' before ')' token
  for(int b=0;b<n,b++){
                     ^
/in/foo.cc:14:15: error: expected ')' before ']' token
   if(a[n]<a[b]])zong=zong+b;
               ^
/in/foo.cc:14:15: error: expected primary-expression before ']' token