View Compilation Error

0_0_36261060_27569.cpp: In function 'int main()':
0_0_36261060_27569.cpp:7:2: error: expected initializer before 'scanf'
  scanf("%d",&n);
  ^
0_0_36261060_27569.cpp:13:17: error: 'h' was not declared in this scope
     scanf("%d",&h[i]);
                 ^
0_0_36261060_27569.cpp:15:7: error: 'h' was not declared in this scope
    s3=h[2]+h[5];
       ^