View Compilation Error

0_0_12715830_25398.cpp: In function `int get_h(int (*)[4])':
0_0_12715830_25398.cpp:45: error: `memset' undeclared (first use this function)
0_0_12715830_25398.cpp:45: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12715830_25398.cpp: In function `bool ida(int (*)[4], int, int)':
0_0_12715830_25398.cpp:80: error: `memcpy' undeclared (first use this function)