牛客网OR141 密码检查——“C”

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
  int n = 0;
  while (scanf("%d", &n) != EOF)
  {
    int i = 0;
    for (i = 0; i < n; i++)
    {
      char password[101] = { 0 };
      int upper = 0;
      int lower = 0;
      int digit = 0;
      int other = 0;
      scanf("%s", password);//捕捉输入的密码
      if (strlen(password) < 8)//密码长度小于8
      {
        printf("NO\n");
        continue;
      }
      if (password[0] >= '0' && password[0] <= '9')
      {
        //密码以数字开头
        printf("NO\n");
        continue;
      }
      char* ptr = password;
      while (*ptr != '\0')
      {
        if (*ptr >= 'a' && *ptr <= 'z')
        {
          lower++;
        }
        else if (*ptr >= 'A' && *ptr <= 'Z')
        {
          upper++;
        }
        else if (*ptr >= '0' && *ptr <= '9')
        {
          digit++;
        }
        else
        {
          other++;
        }
        ptr++;
      }
      if (other > 0)
      {
        //有其他字符
        //题目要求：密码只能有数字和字母组成
        printf("NO\n");
        continue;
      }
      //题目要求：大写字符、小写字符、数字必须具有两种以上
      //比较运算：真为1，假为0
      if ((upper > 0) + (lower > 0) + (digit > 0) < 2)
      {
        //此代码表示密码只有一种字符
        printf("NO\n");
        continue;
      }
      printf("YES\n");
    }
  }
  return 0;
}