View Compilation Error

0_0_4150761_32102.cpp: In function `void change(int, int)':
0_0_4150761_32102.cpp:4: error: `dir' undeclared (first use this function)
0_0_4150761_32102.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4150761_32102.cpp:8: error: `map' undeclared (first use this function)
0_0_4150761_32102.cpp: In function `void lianxian(int, int, int)':
0_0_4150761_32102.cpp:24: error: `fl' undeclared (first use this function)
0_0_4150761_32102.cpp:26: error: `dir' undeclared (first use this function)
0_0_4150761_32102.cpp:27: error: `map' undeclared (first use this function)