View Compilation Error

0_0_9250142_29145.cpp: In function `int main()':
0_0_9250142_29145.cpp:8: error: `fabs' undeclared (first use this function)
0_0_9250142_29145.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9250142_29145.cpp:10: error: expected `;' before '}' token