View Compilation Error

0_0_27734221_31121.cpp: In function 'int main()':
0_0_27734221_31121.cpp:10:21: error: 'memset' was not declared in this scope
 memset(a,0,sizeof(a));
                     ^
0_0_27734221_31121.cpp:20:1: error: expected ';' before '{' token
 {
 ^