gwgsyxyt/step3.c

#include <stdio.h>
typedef struct {
    int id;
    double scores[3];
    double total;
    double average;
} Student;
void displayMenu();
void inputStudentInfo(Student students[], int count);
void calculateTotalAndAverage(Student students[], int count);
void sortStudentsByTotalScore(Student students[], int count);
void displayStudentInfo(Student students[], int count);

int main() {
    Student students[3]; 
    int choice;
    do {
        displayMenu();
        scanf(" %c", &choice); 
        switch (choice) {
            case 'i':
                inputStudentInfo(students, 3);
                calculateTotalAndAverage(students, 3);
                sortStudentsByTotalScore(students, 3);
                displayStudentInfo(students, 3);
                break;
            case 'm':
                printf("You are trying to Make things ordered\n");
                break;
            case 'q':
                printf("You are about to Quit\n");
                break;
            default:
                printf("Wrong input\n");
                break;
        }
    } while (choice != 'q');

    return 0;
}

void displayMenu() {
    printf("\n");
    int i; 
    for (i = 0; i < 30; i++) printf(" ");
    printf("1. Input\n");
    for (i = 0; i < 30; i++) printf(" ");
    printf("2. Output\n");
    for (i = 0; i < 30; i++) printf(" ");
    printf("3. Order\n");
    for (i = 0; i < 30; i++) printf(" ");
    printf("4. Quit\n");
    printf("\nPlease input your option: ");
}

void inputStudentInfo(Student students[], int count) {
    printf("Please input info of the three students:\n");
    int i,j;
    for (i = 0; i < count; i++) {
        printf("");
        scanf("%d", &students[i].id);
        for (j = 0; j < 3; j++) {
            printf("");
            scanf("%lf", &students[i].scores[j]);
        }
    }
}

void calculateTotalAndAverage(Student students[], int count) {
	int i,j;
    for (i = 0; i < count; i++) {
        students[i].total = 0;
        for (j = 0; j < 3; j++) {
            students[i].total += students[i].scores[j];
        }
        students[i].average = students[i].total / 3;
    }
}

void sortStudentsByTotalScore(Student students[], int count) {
    Student temp;
    int i,j;
    for (i = 0; i < count - 1; i++) {
        for (j = 0; j < count - i - 1; j++) {
            if (students[j].total > students[j + 1].total) {
                temp = students[j];
                students[j] = students[j + 1];
                students[j + 1] = temp;
            }
        }
    }
}

void displayStudentInfo(Student students[], int count) {
	int i;
    for (i = 0; i < count; i++) {
        printf("%d,%.1f,%.1f\n", students[i].id, students[i].total, students[i].average);
    }
}