View Compilation Error

0_0_12641168_25656.cpp:1: error: expected constructor, destructor, or type conversion before '<' token
0_0_12641168_25656.cpp:1: error: expected `,' or `;' before '<' token
0_0_12641168_25656.cpp: In function `int main()':
0_0_12641168_25656.cpp:8: error: `scanf' undeclared (first use this function)
0_0_12641168_25656.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12641168_25656.cpp:33: error: `abs' undeclared (first use this function)