程序代码：

#include<stdio.h>
#include<stdlib.h>
#define STD 5
struct student{
    int id;
    char name[20];
    int text_id;
    int score[3];
};
int main()
{
    int i,j;
    struct student std[STD] = {
    {1,"Mike",130210,{99,85,76}},
    {2,"John",130211,{98,83,78}},
    {3,"Tree",130212,{93,86,70}},
    {4,"Jack",130213,{91,81,72}},
    {5,"Nick",130214,{98,89,71}},
    };
    struct student * pointers[STD];
    for(i = 0;i < STD;i++)
    {
        pointers[i] = &std[i];
    }
    for(i = 0;i < STD - 1;i++)
    {
        for(j = 0;j < STD - i - 1;j++)
        {
            if(pointers[j] -> score[0] > pointers[j + 1] -> score[0])
            {
                pointers[j] = &std[j + 1];
                pointers[j + 1] = &std[j];
            }
        }
    }
    for(i = 0;i < STD;i++)
    {
        printf("%d\n",pointers[i]->score[0]);
    }
    return 0;
}