View Compilation Error

0_0_11764898_19431.cpp:11: error: expected constructor, destructor, or type conversion before '<' token
0_0_11764898_19431.cpp:11: error: expected `,' or `;' before '<' token
0_0_11764898_19431.cpp: In function `int main()':
0_0_11764898_19431.cpp:16: error: `scanf' undeclared (first use this function)
0_0_11764898_19431.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11764898_19431.cpp:17: error: `strlen' undeclared (first use this function)
0_0_11764898_19431.cpp:22: error: `mp' undeclared (first use this function)
0_0_11764898_19431.cpp:38: error: `printf' undeclared (first use this function)