View Compilation Error

0_0_6340582_10320.cpp: In function `bool cmp(emn, emn)':
0_0_6340582_10320.cpp:15: error: `dps' undeclared (first use this function)
0_0_6340582_10320.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6340582_10320.cpp:15: error: `hp' undeclared (first use this function)
0_0_6340582_10320.cpp:15: error: `t' undeclared (first use this function)