View Compilation Error

226220_0_13030.cpp: In function `int main()':
226220_0_13030.cpp:7: error: `cin' undeclared (first use this function)
226220_0_13030.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
226220_0_13030.cpp:12: error: `cout' undeclared (first use this function)
226220_0_13030.cpp:12: error: `endl' undeclared (first use this function)