View Compilation Error

0_0_4368567_6492.cpp:2:2: invalid preprocessing directive #using
0_0_4368567_6492.cpp: In function `int main()':
0_0_4368567_6492.cpp:24: error: `cin' undeclared (first use this function)
0_0_4368567_6492.cpp:24: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4368567_6492.cpp:35: error: expected `;' before ')' token
0_0_4368567_6492.cpp:47: error: `cout' undeclared (first use this function)
0_0_4368567_6492.cpp:47: error: `endl' undeclared (first use this function)