View Compilation Error

38624_0_14781.cpp: In function `int main()':
38624_0_14781.cpp:4: error: `scanf' undeclared (first use this function)
38624_0_14781.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
38624_0_14781.cpp:12: error: `printf' undeclared (first use this function)
38624_0_14781.cpp:14: error: `getchar' undeclared (first use this function)