View Compilation Error

918812_0_0_16519.cpp: In function `bool cmp2(const Point&, const Point&)':
918812_0_0_16519.cpp:38: error: expected `;' before ':' token
918812_0_0_16519.cpp:41: error: `a' undeclared (first use this function)
918812_0_0_16519.cpp:41: error: (Each undeclared identifier is reported only once for each function it appears in.)
918812_0_0_16519.cpp: In function `void solve()':
918812_0_0_16519.cpp:79: error: expected `;' before ':' token