View Compilation Error

85158_0_20899.cpp: In function `int main()':
85158_0_20899.cpp:4: error: `scanf' undeclared (first use this function)
85158_0_20899.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
85158_0_20899.cpp:14: error: `printf' undeclared (first use this function)