View Compilation Error

0_0_2915830_21044.cpp:2: error: expected nested-name-specifier before "namespaces"
0_0_2915830_21044.cpp:2: error: `namespaces' has not been declared
0_0_2915830_21044.cpp:2: error: expected `;' before "std"
0_0_2915830_21044.cpp:2: error: expected constructor, destructor, or type conversion before ';' token
0_0_2915830_21044.cpp: In function `int main()':
0_0_2915830_21044.cpp:7: error: `cin' undeclared (first use this function)
0_0_2915830_21044.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2915830_21044.cpp:8: error: `cout' undeclared (first use this function)
0_0_2915830_21044.cpp:8: error: `endl' undeclared (first use this function)