View Compilation Error

0_0_2881009_5838.cpp:2: error: expected `=' before ';' token
0_0_2881009_5838.cpp:2: error: expected identifier before ';' token
0_0_2881009_5838.cpp:2: error: unknown namespace `<declaration error>'
0_0_2881009_5838.cpp: In function `int main()':
0_0_2881009_5838.cpp:11: error: `cin' undeclared (first use this function)
0_0_2881009_5838.cpp:11: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2881009_5838.cpp:23: error: `cout' undeclared (first use this function)
0_0_2881009_5838.cpp:23: error: `endl' undeclared (first use this function)