View Compilation Error

0_0_38362682_10142.cpp: In function 'int main()':
0_0_38362682_10142.cpp:37:26: error: 'memset' was not declared in this scope
    memset(b, 0, sizeof(b));
                          ^
0_0_38362682_10142.cpp:42:25: error: 'memset' was not declared in this scope
   memset(a, 0, sizeof(a));
                         ^