View Compilation Error

1073730_0_0_3449.cpp:2:15: math: No such file or directory
1073730_0_0_3449.cpp: In function `int main()':
1073730_0_0_3449.cpp:13: error: `sqrt' undeclared (first use this function)
1073730_0_0_3449.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)