View Compilation Error

0_0_29787387_32427.cpp: In function 'int main()':
0_0_29787387_32427.cpp:21:23: error: 'casei' was not declared in this scope
   printf("Case %d: ", casei ++);
                       ^
0_0_29787387_32427.cpp:22:19: error: 'i' was not declared in this scope
         if(n == a[i])
                   ^