View Compilation Error

0_0_27064766_13853.cpp: In function 'int main()':
0_0_27064766_13853.cpp:11:6: error: 'i' was not declared in this scope
  for(i=1;i<b;i++)
      ^
0_0_27064766_13853.cpp:19:6: error: 'i' was not declared in this scope
  for(i=0;i<b;i++)
      ^