View Compilation Error

0_0_13347698_27189.cpp:99:11: error: '::main' must return 'int'
 void main()
           ^
0_0_13347698_27189.cpp: In function 'int main()':
0_0_13347698_27189.cpp:105:25: error: 'memset' was not declared in this scope
   memset(a, 0, sizeof(a));
                         ^