View Compilation Error

816439_0_0_29292.cpp: In function `int main()':
816439_0_0_29292.cpp:7: error: `memset' undeclared (first use this function)
816439_0_0_29292.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
816439_0_0_29292.cpp:10: error: `cin' undeclared (first use this function)