View Compilation Error

0_0_11396721_1480.cpp: In function `int main()':
0_0_11396721_1480.cpp:46: error: `scanf' undeclared (first use this function)
0_0_11396721_1480.cpp:46: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11396721_1480.cpp:46: error: `EOF' undeclared (first use this function)
0_0_11396721_1480.cpp:57: error: `printf' undeclared (first use this function)