View Compilation Error

0_0_21448616_26212.cpp: In function 'int main()':
0_0_21448616_26212.cpp:8:20: error: 'n' was not declared in this scope
     for(int i=0; i<n; i++)
                    ^
0_0_21448616_26212.cpp:13:20: error: 'n' was not declared in this scope
     for(int i=0; i<n; i++)
                    ^