View Compilation Error

0_0_26380727_29959.cpp: In function 'int main()':
0_0_26380727_29959.cpp:52:29: error: 'memset' was not declared in this scope
   memset(seq, 0, sizeof(seq));
                             ^
0_0_26380727_29959.cpp:66:29: error: 'memset' was not declared in this scope
   memset(seq, 0, sizeof(seq));
                             ^