程序代码：

#include<stdio.h>
#include <string.h>

struct student
{
char num[20];
char name[20];

};
void main()
{
    struct student stu[20]={
    {"201060001","Zhao"},
    {"201060002","Qian"},
    {"201060009","Jiang"},
    {"201060003","Sun"},
    {"201060005","Wang"},
    {"201060006","Zhou"},
    {"201060004","Li"},
    {"201060008","Zhen"},
    {"201060007","Wu"},
    {"201060010","Shen"}};
    char a[20][300],temp[300];
    int i,j;
    for(i=0;i<10;i++)
        for(j=i+1;j<10;j++)
        {
            if(strcmp(stu[i].num,stu[j].num)>0)
            {
                strcpy(temp,stu[i].num);
                strcpy(stu[i].num,stu[j].num);
                strcpy(stu[j].num,temp);
            }
         }
     printf("*******************************\n");
     printf("Results:\n\n");
    for(i=0;i<10;i++)
    {
        puts(stu[i].num);
        printf("\n");
    }
}

这个问题我已解决，不过新的问题又出来了，下面这个程序怎么改成调用函数。我调用的时候没有值输出，好纠结啊！

程序代码：

[color=#0000FF]#include<stdio.h>
#include <string.h>

struct staff
{
char num[20];
char name[20];

};
void fac(struct staff *p)
{

 int i;

 char x[20];

 for(i=0;i<10;i++)
    {
   
     if(strcmp(x,p->num)==0)
     puts(p->name);
    }
}
void main()
{
    struct staff sta[10]={
    {"201060010","Shen"},
    {"201060002","Qian"},
    {"201060009","Jiang"},
    {"201060003","Sun"},
    {"201060005","Wang"},
    {"201060006","Zhou"},
    {"201060004","Li"},
    {"201060008","Zhen"},
    {"201060007","Wu"},
    {"201060001","Zhao"}
    };
    struct staff temp[20];
    struct staff *p;
     char x[20];
    int i;
    for(i=0;i<10;i++)
    {   
        printf("%s      %s\n",sta[i].num,sta[i].name);
    }
    printf("====================================================\n");
    printf("查找ID:\n");
    gets(x);
    p=&sta[i];
    fac(sta);
    puts(sta[i].name);
  printf("====================================================\n");
   
}