View Compilation Error

0_0_9593753_24351.cpp: In function `int main()':
0_0_9593753_24351.cpp:44: error: `cin' undeclared (first use this function)
0_0_9593753_24351.cpp:44: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9593753_24351.cpp:49: error: `scanf' undeclared (first use this function)
0_0_9593753_24351.cpp:51: error: `printf' undeclared (first use this function)