C语言数组实例(冒泡算法、猜数字)

#include <stdio.h>
#include <stdlib.h>
int main() {
       int a[] = { 1,6,3,8,5 };
       int b[][3] = { {1,2,3},{4,5,6},{7,8,9} };
       printf("一维数组的首元素地址：%p\n", a);
       printf("一维数组的首元素地址：%p\n", &a[0]);
       printf("一维数组的大小：%d\n", sizeof(a));
       printf("一维数组第0个元素的大小：%d\n", sizeof(a[0]));
       printf("一维数组第0个元素的个数：%d\n", sizeof(a)/sizeof(a[0]));
       printf("二维数组的首元素地址：%p\n", b);
       printf("二维数组的首元素地址：%p\n", &b[0]);
       printf("二维数组的首元素地址：%p\n", &b[0][0]);
       printf("二维数组的大小：%d\n", sizeof(b));
       printf("二维数组第1行元素的大小：%d\n", sizeof(b[0]));
       printf("二维数组第1个元素的大小：%d\n", sizeof(b[0][0]));
       int n = sizeof(a) / sizeof(a[0]);
       int tmp;
       for (int i = 0; i < n - 1; i++)
       {
              for (int j = 0; j < n - 1 - i; j++) {
                     if (a[j] > a[j + 1]) {
                           tmp = a[j];
                           a[j] = a[j + 1];
                           a[j + 1] = tmp;
                     }
              }      
       }
       for (int i=0; i < n; i++) {
              printf("%d-", a[i]);
       }
       system("pause");
       return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main() {
       int rand_num[4]; //随机生成一个数，要猜的数字
       int cai_num[4]; //保存要输出来的数字
       int num;//输入的数字
       int n = 0;
       int i = 0;
       printf("猜数字开始啦！系统已生成四位数字");
       srand((unsigned int)time(NULL));//以当前时间设置随机种子
       for (i=0;i<4;i++)
       {
              rand_num[i] = rand() % 10;
       }
       while (1)
       {
              printf("\n请输入一个4位的数字");
              scanf_s("%d", &num);
              cai_num[0] = (num / 1000) % 10;
              cai_num[1] = (num / 100) % 10;
              cai_num[2] = (num / 10) % 10;
              cai_num[3] = num % 10;
              n = 0;
              for (i=0;i<4;i++)
              {
                     if (cai_num[i]>rand_num[i])
                     {
                           printf("第%d位大于正确数字。\n", i+1);
                     }
                     else if(cai_num[i] < rand_num[i]){
                           printf("第%d位小于正确数字。\n", i+1);
                     }
                     else
                     {
                           printf("第%d位正确。\n", i+1);
                           n++;
                     }
              }
              if (4==n)
              {
                     printf("恭喜猜对了");
                     system("pause");
              }
       }
       return 0;
}