c语言程序设计定义学生结构体初始化5名学生的学号、姓名及成绩。struct stu s5=201Zhang78202Li85203Wang60204Wang75205Xue80;编写程序根据用户输入的n值输出升序或降序排列的学生信息。输入1输出降序排列的学生信息；输入2输出升序排列的学生信息。输出格式：-8d-8sdn

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

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

int main() { struct stu s[5]={{201,"Zhang",78},{202,"Li",85},{203,"Wang",60},{204,"Wang",75},{205,"Xue",80}}; int n, i, j; struct stu temp;

printf("Please enter 1 for descending order or 2 for ascending order: ");
scanf("%d", &n);

if(n==1){
    //descending order
    for(i=0;i<4;i++){
        for(j=i+1;j<5;j++){
            if(s[i].score<s[j].score){
                temp=s[i];
                s[i]=s[j];
                s[j]=temp;
            }
        }
    }
    printf("Student information in descending order:\n");
    printf("%-8s%-8s%s\n", "Number", "Name", "Score");
    for(i=0;i<5;i++){
        printf("%-8d%-8s%d\n", s[i].num, s[i].name, s[i].score);
    }
}
else if(n==2){
    //ascending order
    for(i=0;i<4;i++){
        for(j=i+1;j<5;j++){
            if(s[i].score>s[j].score){
                temp=s[i];
                s[i]=s[j];
                s[j]=temp;
            }
        }
    }
    printf("Student information in ascending order:\n");
    printf("%-8s%-8s%s\n", "Number", "Name", "Score");
    for(i=0;i<5;i++){
        printf("%-8d%-8s%d\n", s[i].num, s[i].name, s[i].score);
    }
}
else{
    printf("Invalid input.");
}
return 0;