View Compilation Error

0_0_2903806_13340.cpp:2:16: math: No such file or directory
0_0_2903806_13340.cpp: In function `int main()':
0_0_2903806_13340.cpp:64: error: `sqrt' undeclared (first use this function)
0_0_2903806_13340.cpp:64: error: (Each undeclared identifier is reported only once for each function it appears in.)