View Compilation Error

0_0_21248960_18938.cpp: In function 'bool oob()':
0_0_21248960_18938.cpp:28:12: error: 'nx' was not declared in this scope
     return nx < 1 || nx > r || ny < 1 || ny > c || boom[nx][ny] == d.t + 1;
            ^
0_0_21248960_18938.cpp:28:32: error: 'ny' was not declared in this scope
     return nx < 1 || nx > r || ny < 1 || ny > c || boom[nx][ny] == d.t + 1;
                                ^
0_0_21248960_18938.cpp:28:68: error: 'd' was not declared in this scope
     return nx < 1 || nx > r || ny < 1 || ny > c || boom[nx][ny] == d.t + 1;
                                                                    ^