Student_registration_management_system/t4.c

#include <stdio.h>
int num[4], Class[4];
float Maths[4], Physics[4], English[4], sum[4];
void Swap(int k);
void insert_array();
int main()
{
    insert_array();
}
void insert_array()
{
    for (int i = 0; i < 3; i++)
    {
        scanf("%d%d%f%f%f\n", &num[i], &Class[i], &Maths[i], &Physics[i], &English[i]);
        sum[i] = Maths[i] + Physics[i] + English[i];
    }
    scanf("%d%d%f%f%f", &num[3], &Class[3], &Maths[3], &Physics[3], &English[3]);
    for (int i = 0; i < 3; i++)
    {
        if (num[i] == num[3])
        {
            printf("The student's info has already existed!\n");
            return;
        }
    }
    int inserted_num = num[3];
    sum[3] = Maths[3] + Physics[3] + English[3];
    for (int i = 0; i < 4; i++)
    {
        for (int j = 3; j > i; j--)
        {
            if (Class[j] < Class[j - 1])
            {
                Swap(j);
            }
            else if (Class[j] == Class[j - 1])
            {
                if (sum[j] > sum[j - 1])
                {
                    Swap(j);
                }
            }
        }
    }
    for (int i = 0; i < 4; i++)
    {
        if (num[i] == inserted_num)
        {
            printf("%d %d %.1f %.1f %.1f", num[i], Class[i], Maths[i], Physics[i], English[i]);
            printf(" inserted\n");
        }
        else
        {
            printf("%d %d %.1f %.1f %.1f\n", num[i], Class[i], Maths[i], Physics[i], English[i]);
        }
    }
}
void Swap(int k)
{
    int num0 = num[k], Class0 = Class[k];
    float Maths0 = Maths[k], Physics0 = Physics[k], English0 = English[k], sum0 = sum[k];
    num[k] = num[k - 1];
    Class[k] = Class[k - 1];
    Maths[k] = Maths[k - 1];
    Physics[k] = Physics[k - 1];
    English[k] = English[k - 1];
    sum[k] = sum[k - 1];
    num[k - 1] = num0;
    Class[k - 1] = Class0;
    Maths[k - 1] = Maths0;
    Physics[k - 1] = Physics0;
    English[k - 1] = English0;
    sum[k - 1] = sum0;
}