View Compilation Error

0_0_24466525_13820.cpp: In function 'void bfs(int, int, int)':
0_0_24466525_13820.cpp:49:20: error: 's' was not declared in this scope
                 if(s[x][y]=='@')
                    ^
0_0_24466525_13820.cpp:49:22: error: 'x' was not declared in this scope
                 if(s[x][y]=='@')
                      ^
0_0_24466525_13820.cpp:49:25: error: 'y' was not declared in this scope
                 if(s[x][y]=='@')
                         ^