View Compilation Error

0_0_2095922_20176.cpp:1: error: expected constructor, destructor, or type conversion before ';' token
0_0_2095922_20176.cpp:1: error: invalid token
0_0_2095922_20176.cpp:1: error: expected constructor, destructor, or type conversion before '<' token
0_0_2095922_20176.cpp:1: error: expected `,' or `;' before '<' token
0_0_2095922_20176.cpp: In function `int main()':
0_0_2095922_20176.cpp:8: error: `cin' undeclared (first use this function)
0_0_2095922_20176.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2095922_20176.cpp:16: error: `cout' undeclared (first use this function)
0_0_2095922_20176.cpp:17: error: `endl' undeclared (first use this function)