C写的一个连线游戏

初学C语言，经过写完这个游戏发现与众多语言有很大差别的，虽说语法都差不多，但不能直接return数组这种让我觉得写C是一项体力活啊

这个游戏规则为呈现一个九宫格，电脑和人两个玩家对玩，只要有任意一方优先连成一条直线（3个）就算赢

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算下来赢法一共就有8种，横线3条竖线3条对角线2条

以下是代码

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

bool isDone (int arr[9], char a) {
  int len = 9;
  int len1 = 3;
  int correct = 0;
  bool isWin = false;

  for (unsigned int i = 0; i < len; i++) {
    if (arr[i] == a) {
      correct++;
    }
    
    if ((i + 1) % len1 == 0) {
      if (correct == len1) {
        isWin = true;
        break;
      } else {
        correct = 0;
      }
    }
  }

  for (unsigned int i = 0; i < len1; i++) {
    correct = 0;

    for (unsigned int j = i; j < len; j+=len1) {
      if (arr[j] == a) {
        correct++;
      }
    }

    if (correct == 3) {
      isWin = true;
      printf("\n Here 2");
      break;
    }    
  }

  if (arr[0] == a && arr[4] == a && arr[8] == a) {
    isWin = true;
  } else if (arr[2] == a && arr[4] == a && arr[6] == a) {
    isWin = true;
  }

  return isWin;
}

int showGrid (int arr[9]) {
  // int len = sizeof(arr) / sizeof(arr[0]);
  int len = 9;

  printf("\n");
  for (unsigned int i = 0; i < len; i++) {
    if (arr[i] != 0) {
      printf(" %c ", arr[i]);
    } else {
      printf(" %d ", i + 1);      
    }

    if ((i + 1) % 3 == 0) {
      printf("\n");
    }
  }

  printf("\n");
  return 0;
}

int avalible (int arr[9]) {
  // int arrLen = sizeof(arr) / sizeof(arr[0]);
  int arrLen = 9;
  int av = 0;
  for (unsigned int i = 0; i < arrLen; i++) {
    if (arr[i] == 0) {
      av++;
    }
  }
  return av;
}

int clear (int arr[9]) {
  int len = 9;
  for (unsigned int i = 0; i < len; i++) {
    arr[i] = 0;
  }

  return 0;
}

int random1 (int min, int max) {
  srand(time(NULL));
  return rand()%((max+1)-min) + min;
}

int main (void) {
  int grid[9] = {0};
  int gridCount = sizeof(grid) / sizeof(grid[0]);
  int times = 0;
  int enter = 0;
  int enterTimes = 0;
  int av = 0;
  bool done = false;
  char a = 65;
  char b = 68;
  char restart = 0;
  showGrid(grid);

  printf(" %d", 1 % 3);
  do {
    times++;
    enterTimes = 0;
    enter = 0;

    if (times % 2 == 0) {
      enter = random1(1, 9);
      while (grid[enter - 1] != 0) {
        if (enter >= gridCount) {
          enter = 0;
        }
        
        enter++;
      }

      printf("\n Computer enter the number : %d", enter);
    } else {
      printf("\n User enter the number : ");
      do {
        scanf(" %d", &enter);        
        
        ++enterTimes;
        if (grid[enter - 1] > 0) {
          printf("\n Error: cannot enter this number. You can enter below number. \n ");
          avalible(grid);
          for (unsigned int i = 0; i < gridCount; i++) {
            if (grid[i] == 0) {
              printf(" %d ", i + 1);
            }
          }
          printf("\n Re-enter number please \n ");
        }
      } while (grid[enter - 1] > 0);
    }

    if (times % 2 == 0) {
      grid[enter - 1] = a;
    } else {
      grid[enter - 1] = b;
    }

    showGrid(grid);
    av = avalible(grid);

    if (av >= 1) {
      if (times % 2 == 0) {
        done = isDone(grid, a);
      } else {
        done = isDone(grid, b);
      }

      if (done) {
        if (times % 2 == 0) { 
          printf("\n Computer win! ");
        } else {
          printf("\n User win! ");
        }

        printf("\n Do you wanna restart? (Y/n) ");
        scanf(" %c", &restart);

        while (restart != 'y' && restart != 'n') {
          printf("\n Please input y or n ");
          scanf(" %c", &restart);
        }

        if (restart == 'y') {
          clear(grid);
          showGrid(grid);
          times = 0;
          done = false;
        } else if (restart == 'n') {
          done = true;
        }
      }
    } else {
      printf("\n Game end! ");
      printf("\n Do you wanna restart? (Y/n) ");
      scanf(" %c", &restart);

      while (restart != 'y' && restart != 'n') {
        printf("\n Please input y or n ");
        scanf(" %c", &restart);
      }

      if (restart == 'y') {
        clear(grid);
        showGrid(grid);
        times = 0;
        done = false;
      } else if (restart == 'n') {
        done = true;
      }
    }
  } while (!done);
  return 0;
}