View Compilation Error

0_0_1144352_9492.cpp: In function `int main()':
0_0_1144352_9492.cpp:18: error: `memset' undeclared (first use this function)
0_0_1144352_9492.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1144352_9492.cpp:30: error: `strcmp' undeclared (first use this function)
0_0_1144352_9492.cpp:32: error: `strcpy' undeclared (first use this function)
0_0_1144352_9492.cpp:33: error: `memcpy' undeclared (first use this function)
0_0_1144352_9492.cpp:47: error: `return0' undeclared (first use this function)