View Compilation Error

0_0_14544334_10453.cpp: In constructor 'checkerboard::checkerboard()':
0_0_14544334_10453.cpp:17:22: error: 'memset' was not declared in this scope
  memset(a,0,sizeof(a));
                      ^
0_0_14544334_10453.cpp: At global scope:
0_0_14544334_10453.cpp:63:11: error: '::main' must return 'int'
 void main(){
           ^