View Compilation Error

0_0_2057841_27831.cpp: In function `bool cmp(const Mice&, const Mice&)':
0_0_2057841_27831.cpp:14: error: expected `)' before ';' token
0_0_2057841_27831.cpp: In function `void dp()':
0_0_2057841_27831.cpp:49: error: `a' undeclared (first use this function)
0_0_2057841_27831.cpp:49: error: (Each undeclared identifier is reported only once for each function it appears in.)