View Compilation Error

1044045_0_0_9717.cpp: In function `int main()':
1044045_0_0_9717.cpp:1: error: `scanf' undeclared (first use this function)
1044045_0_0_9717.cpp:1: error: (Each undeclared identifier is reported only once for each function it appears in.)
1044045_0_0_9717.cpp:1: error: `puts' undeclared (first use this function)