View Compilation Error

0_0_23601911_18038.cpp: In function 'void getmap()':
0_0_23601911_18038.cpp:2:24: error: 'n' was not declared in this scope
     for(int i = 0; i < n; ++i){
                        ^
0_0_23601911_18038.cpp:3:28: error: 'm' was not declared in this scope
         for(int j = 0; j < m; ++j)
                            ^
0_0_23601911_18038.cpp:4:16: error: 'str' was not declared in this scope
             if(str[i][j] == '*')
                ^
0_0_23601911_18038.cpp:5:13: error: 'map' was not declared in this scope
             map[x[i][j]][y[i][j]] = 1;
             ^
0_0_23601911_18038.cpp:5:17: error: 'x' was not declared in this scope
             map[x[i][j]][y[i][j]] = 1;
                 ^
0_0_23601911_18038.cpp:5:26: error: 'y' was not declared in this scope
             map[x[i][j]][y[i][j]] = 1;
                          ^