View Compilation Error

0_0_1744005_9962.cpp: In member function `KSTATE& KSTATE::operator=(const KSTATE&)':
0_0_1744005_9962.cpp:29: error: `strcpy_s' undeclared (first use this function)
0_0_1744005_9962.cpp:29: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1744005_9962.cpp: In copy constructor `KSTATE::KSTATE(const KSTATE&)':
0_0_1744005_9962.cpp:74: error: `strcpy_s' undeclared (first use this function)
0_0_1744005_9962.cpp: In constructor `KSTATE::KSTATE(const char*)':
0_0_1744005_9962.cpp:79: error: `strcpy_s' undeclared (first use this function)