View Compilation Error

0_0_1248131_12290.cpp: In function `int main()':
0_0_1248131_12290.cpp:45: error: `cin' undeclared (first use this function)
0_0_1248131_12290.cpp:45: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1248131_12290.cpp:54: error: `scanf' undeclared (first use this function)
0_0_1248131_12290.cpp:73: error: `cout' undeclared (first use this function)
0_0_1248131_12290.cpp:73: error: `endl' undeclared (first use this function)