View Compilation Error

0_0_16761637_31776.cpp: In function 'int main()':
0_0_16761637_31776.cpp:14:7: error: 'i' was not declared in this scope
  for (i=0;i<=1000;i++)
       ^
0_0_16761637_31776.cpp:15:14: error: 'j' was not declared in this scope
         for (j=0;j<=1000;j++)
              ^