View Compilation Error

221925_0_24431.cpp:1:2: invalid preprocessing directive #includea
221925_0_24431.cpp: In function `int main()':
221925_0_24431.cpp:6: error: `cin' undeclared (first use this function)
221925_0_24431.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
221925_0_24431.cpp:13: error: `cout' undeclared (first use this function)
221925_0_24431.cpp:13: error: `endl' undeclared (first use this function)