View Compilation Error

0_0_13827909_10693.cpp: In function 'int main()':
0_0_13827909_10693.cpp:34:10: error: 'j' was not declared in this scope
    if(i==j) continue;
          ^
0_0_13827909_10693.cpp:35:20: error: 'j' was not declared in this scope
    t[pl++]=acos((a[j].x-a[i].x)/dis(a[i],a[j]));                
                    ^
0_0_13827909_10693.cpp:38:12: error: 'pl' was not declared in this scope
   sort(t,t+pl);            
            ^
0_0_13827909_10693.cpp:47:3: error: 'cnt' was not declared in this scope
   cnt-=res;
   ^
0_0_13827909_10693.cpp:49:19: error: 'cnt' was not declared in this scope
  printf("%I64d/n",cnt);    
                   ^