#include <stdio.h>
#include <string.h>
struct date
{
int year;
int month;
int day;
};
struct student
{
int num;
char name[20];
struct date birth;
char gender;
float score;
};


void main()
{
void sort(student *ps,int n);

void printfsort(student s[],int n);
student s[10];
int i;
for(i=0;i<10;i++)
{
scanf("%d %s %d-%d-%d %c %f",&s[i].num,&s[i].name,&s[i].birth.year,&s[i].birth.month,&s[i].birth.day,&s[i].gender,&s[i].score);
}
sort(s,10);
printf("After sort(score):\n");
printfsort(s,10);


}
void sort(student *ps,int n)
{
int i,j;
student t;
student *p=ps;

for(i=0;i<n-1;i++)
{
   
    for(j=0;j<n-1-i;j++)
    {
   
    student *p2=p+1;
        if(p->score<p2->score)
            {
            t=*p;
            *p=*p2;
            *p2=t;
        p++;   
            }
        //
    }   
   
}
        
}


void printfsort(student s[],int n)
{
int i;
for(i=0;i<10;i++)
{
printf("%d\t%s\t%d-%d-%d\t%c\t%0.1f\t",s[i].num,s[i].name,s[i].birth.year,s[i].birth.month,s[i].birth.day,s[i].gender,s[i].score);
printf("\n");
}

}

p是结构类型指针，不能用*p表示整个结构。

我结果显示是这样的  我觉得是p++的位置错了   ToT  

哦，结构是可以同类型左右值。

试试这样排
student *p, *p2;
for(p=ps,i=0; i<n-1; i++,p++)
{
    for(p2=p1+1,j=i+1; j<n; j++,p2++)
    {
        if(p->score<p2->score)
        {
            t=*p;
            *p=*p2;
            *p2=t;
         }
    }
}