View Compilation Error

0_0_2937876_28606.cpp: In function `double dis(int, int)':
0_0_2937876_28606.cpp:37: error: `pow' undeclared (first use this function)
0_0_2937876_28606.cpp:37: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2937876_28606.cpp:37: error: `sqrt' undeclared (first use this function)