View Compilation Error

0_0_38589706_22807.cpp:19:11: error: '::main' must return 'int'
 void main() {
           ^
0_0_38589706_22807.cpp: In function 'int main()':
0_0_38589706_22807.cpp:30:2: error: return-statement with no value, in function returning 'int' [-fpermissive]
  return;
  ^~~~~~