付刚+2302220040

[yuhouqingtian]

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

typedef struct {
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%d的考试成绩: ", 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;
}