Student_registration_management_system/t3.c

#include <stdio.h>
typedef struct INFO
{
    int num;
    float Maths;
    float Physics;
    float English;
    float sum;
    float average;
}Info;
Info stu[3];
void menu();
void info();
void grade_sort();
int main()
{
    menu();
    info();
    grade_sort();
}
void info()
{
    for (int i = 0; i < 3; i++)
    {
        scanf("%d%f%f%f", &stu[i].num, &stu[i].Maths, &stu[i].Physics, &stu[i].English);
    }
}
void menu()
{
    for (int i = 0; i < 30; i++)
    {
        printf(" ");
    }
    printf("1.Input\n");
    for (int i = 0; i < 30; i++)
    {
        printf(" ");
    }
    printf("2.Output\n");
    for (int i = 0; i < 30; i++)
    {
        printf(" ");
    }
    printf("3.Order\n");
    for (int i = 0; i < 30; i++)
    {
        printf(" ");
    }
    printf("4.Quit\n");
    char c;
    scanf("%c", &c);
    if (c == 'i')
    {
        printf("Please input info of the three students:\n");
    }
    else if (c == 'o')
    {
        printf("You are trying to Output info\n");
    }
    else if (c == 'm')
    {
        printf("You are trying to Make things ordered\n");
    }
    else if (c == 'q')
    {
        printf("You are about to Quit\n");
    }
    else{
        printf("Wrong input\n");
    }
}
void grade_sort()
{
    for (int i = 0; i < 3; i++)
    {
        stu[i].sum = stu[i].Maths + stu[i].Physics + stu[i].English;
        stu[i].average = stu[i].sum / 3;
    }
    for (int i = 0; i < 3; i++)
    {

        for (int j = 2; j > i; j--)
        {
            if (stu[j].sum < stu[j - 1].sum)
            {
                Info tmp = stu[j];
                stu[j] = stu[j - 1];
                stu[j - 1] = tmp;
            }
        }
    }
    for (int i = 0; i < 3; i++)
    {
        printf("%d,%.1f,%.1f\n", stu[i].num, stu[i].sum, stu[i].average);
    }
}