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

using namespace std;
const int MaxSize=8;

typedef struct
{
int stuno;
char stuname[20];
int stuage;
}TableElem;

TableElem stu[]={{1001,"zhangsan",20},{1002,"wangwu",18},{1003,"lisi",19},{1004,"zhaofeng",20},
{1005,"ligang",19},{1006,"wangjun",21},{1007,"chenguang",18},{1008,"zhangli",20}};

typedef struct
{
TableElem elem[MaxSize];
int n;
}Sqtable; //学生的数组

int searchsqtable(Sqtable T,int key)
{
T.elem[0].stuno=key; //岗哨
int i=T.n;
while(T.elem[i].stuno!=key)
i--;
return i;
}

int main()
{
Sqtable seq;
for(int i=0;i<MaxSize;i++)
{
seq.elem[i]=stu[i];
}
seq.n=MaxSize;
int kk,mm;
printf("请输入要查找的学号：");
cin>>kk;

mm=searchsqtable(seq,kk);
//cout<<mm<<endl;
cout<<"该序号的姓名是："<<seq.elem[mm].stuname<<"\t"<<"年龄："<<seq.elem[mm].stuage<<endl;
return 1;
}

运行结果：