录入一定数据并进行查找，如不匹配则else单纯循环，无论输入值是否正确都只输出else语句内容
代码如下：

#include<stdio.h>
    struct personnel{
    char name[15],birthplace[15];
    int age, id;
    //if the input ID is not int, the next two line will appear together//
    //what is the problem?//
    //Answer: the later Enter in the buffer makes the gets() skip//
    //add flushall() will do good//
};
int ctr,check;
main()
{
    struct personnel profile[3];
    for(ctr=0; ctr<2; ctr++)
    {
      printf("\n%d.Hello, what's your name?\n", ctr+1);
      gets(profile[ctr].name);
      puts("\nwhat's your id number?");
      scanf(" %d", &profile[ctr].id);
      fflush(stdin);
      puts("\nOk, what's your birthplace?");
      gets(profile[ctr].birthplace);
      fflush(stdin);
      puts("\nAlright, what's your age");
      scanf(" %d", &profile[ctr].age);
      fflush(stdin);
    }
      puts("Which ID do you want to check:");
      scanf(" %d", &check);
    for(ctr=0; ctr<2; ctr++)
    {if(check == profile[ctr].id)
      {
      printf("\nThe id you are checking is %d, name:%s, age:%d, born:%s\n\n",
      profile[ctr].id, profile[ctr].name, profile[ctr].age,
      profile[ctr].birthplace);
      break;
      }
     else
      {
          puts("Please type in correct id number");
          fflush(stdin);
       scanf(" %d", &check);
       continue;
      }
    }
   }

没人回答楼主吗

会是我使用的编译器的问题吗？我用的C-Free5.0

好像不是吧 清空前不已经存到相应地址了？

小白 我试试

为了方便 我就测试2组数据啊