View Compilation Error

0_0_5493253_13990.cpp:2: error: expected constructor, destructor, or type conversion before '<' token
0_0_5493253_13990.cpp:2: error: expected `,' or `;' before '<' token
0_0_5493253_13990.cpp: In function `int main()':
0_0_5493253_13990.cpp:5: error: `cin' undeclared (first use this function)
0_0_5493253_13990.cpp:5: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5493253_13990.cpp:12: error: `v' undeclared (first use this function)
0_0_5493253_13990.cpp:27: error: `cout' undeclared (first use this function)
0_0_5493253_13990.cpp:28: error: `system' undeclared (first use this function)