View Compilation Error

312024_0_22574.cpp: In function `int main()':
312024_0_22574.cpp:5: error: `cin' undeclared (first use this function)
312024_0_22574.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
312024_0_22574.cpp:20: error: `cout' undeclared (first use this function)
312024_0_22574.cpp:20: error: `endl' undeclared (first use this function)