View Compilation Error

0_0_36008811_27114.cpp:5:11: error: '::main' must return 'int'
 void main()
           ^
0_0_36008811_27114.cpp: In function 'int main()':
0_0_36008811_27114.cpp:12:25: error: 'memset' was not declared in this scope
   memset(v, 0, sizeof(v));
                         ^