View Compilation Error

756283_0_0_24816.cpp: In function `int main()':
756283_0_0_24816.cpp:38: error: `scanf' undeclared (first use this function)
756283_0_0_24816.cpp:38: error: (Each undeclared identifier is reported only once for each function it appears in.)
756283_0_0_24816.cpp:38: error: `EOF' undeclared (first use this function)
756283_0_0_24816.cpp:42: error: `memset' undeclared (first use this function)
756283_0_0_24816.cpp:47: error: `printf' undeclared (first use this function)