View Compilation Error

1026469_0_0_24313.cpp: In function `int main()':
1026469_0_0_24313.cpp:5: error: `cin' undeclared (first use this function)
1026469_0_0_24313.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
1026469_0_0_24313.cpp:10: error: `cout' undeclared (first use this function)
1026469_0_0_24313.cpp:10: error: `endl' undeclared (first use this function)