View Compilation Error

0_0_31452112_12584.cpp: In function 'int main()':
0_0_31452112_12584.cpp:8:14: error: 'n' was not declared in this scope
           if(n==0)
              ^
0_0_31452112_12584.cpp:17:14: error: 'n' was not declared in this scope
      if(sum>=n)
              ^