View Compilation Error

0_0_5556117_9311.cpp: In function `int main()':
0_0_5556117_9311.cpp:2: error: `stdin' undeclared (first use this function)
0_0_5556117_9311.cpp:2: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5556117_9311.cpp:2: error: `freopen' undeclared (first use this function)
0_0_5556117_9311.cpp:3: error: `stdout' undeclared (first use this function)
0_0_5556117_9311.cpp:8: error: `scanf' undeclared (first use this function)
0_0_5556117_9311.cpp:8: error: `EOF' undeclared (first use this function)
0_0_5556117_9311.cpp:11: error: `swap' undeclared (first use this function)
0_0_5556117_9311.cpp:17: error: `pow' undeclared (first use this function)
0_0_5556117_9311.cpp:23: error: `printf' undeclared (first use this function)