shudujuzhen/2

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define SIZE 9

void generateMatrix(int ma[SIZE][SIZE]);
void printMatrix(int ma[SIZE][SIZE]);

int main() {
    int ma[SIZE][SIZE];
    srand(time(NULL));
    generateMatrix(ma);
    printMatrix(ma);
    return 0;
}

void generateMatrix(int ma[SIZE][SIZE]) {
    for (int i = 0; i < SIZE; i++) {
        for (int j = 0; j < SIZE; j++) {
            ma[i][j] = 0;
        }
    }

    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            int nums[9] = {0};
            for (int k = 0; k < 3; k++) {
                int num;
                do {
                    num = rand() % 9 + 1;
                } while (nums[num - 1] == 1);
                nums[num - 1] = 1;
                ma[i * 3 + k][j * 3 + rand() % 3] = num;
            }
        }
    }
    for (int i = 3; i < 6; i++) {
        for (int j = 0; j < 3; j++) {
            int nums[9] = {0};
            for (int k = 0; k < 3; k++) {
                int num;
                do {
                    num = rand() % 9 + 1;
                } while (nums[num - 1] == 1 || (i - 3) * 3 + k < 3 ? ma[(i - 3) * 3 + k][j * 3 + rand() % 3] == num : 0);
                nums[num - 1] = 1;
                ma[i * 3 + k][j * 3 + rand() % 3] = num;
            }
        }
    }
    for (int i = 6; i < 9; i++) {
        for (int j = 0; j < 3; j++) {
            int nums[9] = {0};
            for (int k = 0; k < 3; k++) {
                int num;
                do {
                    num = rand() % 9 + 1;
                } while (nums[num - 1] == 1 || i - 6 < 3 ? ma[(i - 6) * 3 + k][j * 3 + rand() % 3] == num : 0);
                nums[num - 1] = 1;
                ma[i * 3 + k][j * 3 + rand() % 3] = num;
            }
        }
    }
}

void printMatrix(int ma[SIZE][SIZE]) {
    for (int i = 0; i < SIZE; i++) {
        for (int j = 0; j < SIZE; j++) {
            printf("%c ", ma[i][j] ? '1' + ma[i][j] - 1 : '.');
            if (j % 3 == 2 && j != SIZE - 1) printf("| ");
        }
        if (i % 3 == 2 && i != SIZE - 1) printf("\n---------------------\n");
        else if (i != SIZE - 1) printf("\n");
    }
}