View Compilation Error

481188_0_0_189.cpp: In function `int main()':
481188_0_0_189.cpp:1: error: `scanf' undeclared (first use this function)
481188_0_0_189.cpp:1: error: (Each undeclared identifier is reported only once for each function it appears in.)
481188_0_0_189.cpp:1: error: `printf' undeclared (first use this function)