View Compilation Error

808533_0_0_25395.cpp: In function `int main()':
808533_0_0_25395.cpp:4: error: `scanf' undeclared (first use this function)
808533_0_0_25395.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
808533_0_0_25395.cpp:7: error: `printf' undeclared (first use this function)