View Compilation Error

51030_0_17311.cpp: In function `int main()':
51030_0_17311.cpp:7: error: `cin' undeclared (first use this function)
51030_0_17311.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
51030_0_17311.cpp:28: error: `cout' undeclared (first use this function)
51030_0_17311.cpp:28: error: `endl' undeclared (first use this function)