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#define DIM 9
 
inline int& mask(int x, int y) { return MaskA[y][x]; }
inline int& label(int x, int y) { return LabelA[y][x]; }
 
void main()
{
    int MaskA[DIM][DIM];
    int     LabelA[DIM][DIM];
    int total=5;
    init(total);
}
 
void init(int total) {
        for (int y = 0; y < DIM; y++)
            for (int x = 0; x < DIM; x++) {
                mask(x, y) = 9;
                label(x, y) = 0;
            }
    }

prog.cpp: In function ‘int& mask(int, int)’:
prog.cpp:3:41: error: ‘MaskA’ was not declared in this scope
 inline int& mask(int x, int y) { return MaskA[y][x]; }
                                         ^~~~~
prog.cpp:3:41: note: suggested alternative: ‘mask’
 inline int& mask(int x, int y) { return MaskA[y][x]; }
                                         ^~~~~
                                         mask
prog.cpp: In function ‘int& label(int, int)’:
prog.cpp:4:42: error: ‘LabelA’ was not declared in this scope
 inline int& label(int x, int y) { return LabelA[y][x]; }
                                          ^~~~~~
prog.cpp:4:42: note: suggested alternative: ‘label’
 inline int& label(int x, int y) { return LabelA[y][x]; }
                                          ^~~~~~
                                          label
prog.cpp: At global scope:
prog.cpp:6:11: error: ‘::main’ must return ‘int’
 void main()
           ^
prog.cpp: In function ‘int main()’:
prog.cpp:11:5: error: ‘init’ was not declared in this scope
     init(total);
     ^~~~
prog.cpp:11:5: note: suggested alternative: ‘int’
     init(total);
     ^~~~
     int

Standard output is empty