View Compilation Error

171928_0_18545.cpp:2:16: math: No such file or directory
171928_0_18545.cpp: In function `int main()':
171928_0_18545.cpp:13: error: `sqrt' undeclared (first use this function)
171928_0_18545.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
171928_0_18545.cpp:15: error: stray '\161' in program
171928_0_18545.cpp:15: error: stray '\161' in program
171928_0_18545.cpp:15: error: stray '\161' in program
171928_0_18545.cpp:15: error: stray '\161' in program
171928_0_18545.cpp:15: error: stray '\161' in program
171928_0_18545.cpp:15: error: stray '\161' in program