View Compilation Error

0_0_39389835_28928.cpp:3:1: error: '::main' must return 'int'
    3 | void main()
      | ^~~~
0_0_39389835_28928.cpp: In function 'int main()':
0_0_39389835_28928.cpp:6:32: error: 'n' was not declared in this scope
    6 |         while (~scanf_s("%d", &n))
      |                                ^