View Compilation Error

0_0_33512197_10168.cpp: In function 'bool check(int, int)':
0_0_33512197_10168.cpp:25:26: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
     if(x >= 0 && x <  && y >= 0 && y < M && mapp[x][y] != '*' && !vis[x][y])
                          ^
0_0_33512197_10168.cpp:25:26: error: label 'y' used but not defined