View Compilation Error

0_0_9288033_31575.cpp: In function `void init()':
0_0_9288033_31575.cpp:55: error: `vis' undeclared (first use this function)
0_0_9288033_31575.cpp:55: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9288033_31575.cpp: At global scope:
0_0_9288033_31575.cpp:98: error: `int vis[20]' used prior to declaration