[此贴子已经被作者于2019-6-19 11:45编辑过]

程序代码：

#include <stdio.h>

struct person {
    int num;
    char name[20];
    double score;
} student[5] = {{140602215, "zhang", 89.5}, {140602216, "li", 45},
    {140602217, "wang", 78}, {140602218, "zhao", 67}, {140602219, "ru", 90}
};

int main(void) {
    int i, j;
    struct person temp;

    for(i = 0; i < 4; i++) {
        for(j = i+1; j < 5; j++)
            if(student[i].score > student[j].score) {
                temp = student[i];
                student[i] = student[j];
                student[j] = temp;
            }
    }

    for(i = 0 ; i < 5; i++) {
        printf("%d\t%s\t%0.1f\n",
               student[i].num, student[i].name, student[i].score);
    }

    return 0;
}