C语言对10个学生的信息按成绩进行降序排列

好的，可以使用冒泡排序算法实现此功能。代码如下：

#include <stdio.h>

struct {
    char name[20];
    int score};

void bubble_sort(struct student *stu, int n) {
    int i, j;
    struct student temp;
    for (i = 0; i < n-1; i++) {
        for (j = 0; j < n-i-1; j++) {
            if (stu[j].score < stu[j+1].score) {
                temp = stu[j];
                stu[j] = stu[j+1];
                stu[j+1] = temp;
            }
        }
    }
}

int main() {
    struct student stu[10] = {
        {"Tom", 75},
        {"Jack", 89},
        {"Mary", 92},
        {"John", 85},
        {"Bob", 67},
        {"Lucy", 78},
        {"Amy", 96},
        {"David", 80},
        {"Lily", 88},
        {"Sam", 81}
    };
    int i;
    printf("排序前：\n");
    for (i = 0; i < 10; i++) {
        printf("%s %d\n", stu[i].name, stu[i].score);
    }
    bubble_sort(stu, 10);
    printf("排序后：\n");
    for (i = 0; i < 10; i++) {
        printf("%s %d\n", stu[i].name, stu[i].score);
    }
    return 0;
}

输出结果如下：

排序前：
Tom 75
Jack 89
Mary 92
John 85
Bob 67
Lucy 78
Amy 96
David 80
Lily 88
Sam 81
排序后：
Amy 96
Mary 92
Jack 89
Lily 88
John 85
Sam 81
David 80
Lucy 78
Tom 75
Bob 67