陈家义+2302580041

[yuanchengjiayu]

#include<stdio.h>
#include<stdlib.h>

typedef struct work1
{
int id;
float score;
}Student;

void input_students(Student* students,int n){
for (int i = 0;i < n;i++){
printf("请输入第%d个学生的学号:",i + 1);
scanf("%d",&students[i].id);
printf("请输入第%d个学生的成绩:",students[i].id);
scanf("%f",&students[i].score);
}
}

void sort_students(Student* students,int n){
for(int i=0;i<n-1;i++){
for(int j=0;j<n-i-1;j++){
if(students[j].score < students[j+1].score){
Student temp = students[j];
students[j] = students[j+1];
students[j+1] = temp;
}
}
}
}

float calculate_avg_score(Student* students,int n){
float total_score = 0.0;
for(int i=0;i<n;i++){
total_score += students[i].score;
}
return total_score / n;
}

int count_failed_students(Student* students,int n){
int failed_count = 0;
for(int i=0;i<n;i++){
if(students[i].score<60.0){
failed_count++;
}
}
return failed_count;
}

int main() {
int n;
printf("请输入学生人数：");
scanf("%d",&n);
Student* students = (Student*)malloc(n * sizeof(Student));

input_students(students,n);
sort_students(students,n);

printf("\n学号\t成绩\n");
for(int i=0;i<n;i++){
    printf("%d\t%.2f\n",students[i].id,students[i].score);
}

float avg_score = calculate_avg_score(students,n);
int failed_count = count_failed_students(students,n);

printf("\n平均成绩: %.2f\n", avg_score);
printf("不及格人数: %d\n", failed_count);
free(students);
return 0;

}