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| Program Sudoku;
USES WINCRT;
TYPE GRILLE = ARRAY[1..9,1..9] OF INTEGER;
VAR T : GRILLE;
PROCEDURE lecture(var T : GRILLE);
var F : TEXT;
nb : STRING;
c : CHAR;
x, y, i, h : INTEGER;
BEGIN
AssignFile(F, 'grille.txt');
Rewrite(F);
Reset(F);
FOR x:=1 TO 9 DO
BEGIN
Readln(F, nb);
i := 1;
y := 1;
WHILE (i<>20)AND(y<>10) DO
BEGIN
c := nb[i];
h := INTEGER(c);
T[x][y] := h;
i := i + 2;
y := y + 1;
END;
END;
END;
FUNCTION isSafe(T : GRILLE; i, j, k : INTEGER) : BOOLEAN;
var a : BOOLEAN;
l, m, n, p, q : INTEGER;
BEGIN
a := true;
l := 1;
WHILE(l<=9)AND(a=true) DO
BEGIN
IF(l<>i)AND(T[l][j]=k)
THEN BEGIN
a := false;
END;
l := l + 1;
END;
IF a=true
THEN BEGIN
l := 1;
WHILE (l<=9)AND(a=true) DO
BEGIN
IF (l<>j)AND(T[i][j]=k)
THEN BEGIN
a := false;
END;
l := l + 1;
END;
END;
IF a = true
THEN BEGIN
m := i div 3 * 3;
n := j div 3 * 3;
FOR p:=m TO m+2 DO
BEGIN
FOR q:=n TO n+2 DO
BEGIN
a := false;
END;
END;
END;
isSafe := a;
END;
PROCEDURE AfficherSolution(T : GRILLE);
var x, y : INTEGER;
BEGIN
FOR x:=1 TO 9 DO
BEGIN
FOR y:=1 TO 9 DO
BEGIN
Write(T[x][y]);
Write(' ');
END;
Writeln(' ');
END;
END;
PROCEDURE SudokuSolverIJ(T : GRILLE; i, j : INTEGER);
var k : INTEGER;
BEGIN
IF i>9
THEN BEGIN
AfficherSolution(T);
END
ELSE BEGIN
IF T[i][j] <> 1
THEN BEGIN
IF j <> 9
THEN BEGIN
SudokuSolverIJ(T, i, j+1);
END
ELSE BEGIN
SudokuSolverIJ(T, i+1, 1);
END;
END
ELSE BEGIN
FOR k:=1 TO 9 DO
BEGIN
IF isSafe(T, i, j, k)
THEN BEGIN
T[i][j] := k;
IF j <> 9
THEN BEGIN
SudokuSolverIJ(T, i, j+1);
END
ELSE BEGIN
SudokuSolverIJ(T, i+1, 1);
END;
END;
END;
T[i][j] := 0;
END;
END;
END;
PROCEDURE SudokuSolver(T : GRILLE);
BEGIN
SudokuSolverIJ(T,1,1);
END;
BEGIN
lecture(T);
SudokuSolver(T);
Readln();
END. |
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