View Compilation Error

0_0_35539033_31293.cpp: In function 'int main()':
0_0_35539033_31293.cpp:5:1: error: 'in' was not declared in this scope
 in n;
 ^
0_0_35539033_31293.cpp:7:13: error: 'n' was not declared in this scope
 scanf("%d",&n);getchar();
             ^