View Compilation Error

59001_0_20206.cpp: In function `int main()':
59001_0_20206.cpp:5: error: `scanf' undeclared (first use this function)
59001_0_20206.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
59001_0_20206.cpp:12: error: `House' undeclared (first use this function)
59001_0_20206.cpp:16: error: `Sort' undeclared (first use this function)
59001_0_20206.cpp:30: error: `printf' undeclared (first use this function)