cscyzyby/Main.c

/*this code is just a very simple example.
it only works when the id and class both less than INT_MAX
also,you need make sure the id and the class will not be the same
,and the name should consist of only letters
Finally, fxxk the C89*/

#define _CRT_SECURE_NO_WARNINGS 1

/*declare including*/
#include <stdio.h>
#include <string.h>
#include <limits.h>

/*declaration*/
int Mycontinue(int num); void Search(char info[]);
void Inputf(); void Deletef(); void Selectf(); void Orderf(); void Outputf(); void Quitf();
void mainLoop();

/*create the main struct*/
typedef struct 
{
    int  id;
    int class;
    char name[50];
    float score[3];
    float total_score;
} Student;

/*initialize the global variable*/
#define MAX_STUDENTS 100
Student usrlist[MAX_STUDENTS];
Student tmplist[MAX_STUDENTS];
int slist[MAX_STUDENTS];

int listlength = -1;
int tmplength = -1;
int slength;

int run = 1;

/*create secondary module*/
int Mycontinue(int num) /*completed*/
{
    char choice[10];
    printf("continue?\n");
choose:
    {
        scanf("%9s", choice);
        getchar();
        switch (strlen(choice))
        {
        case 2:return 0;
        case 3:return 1;
        default:printf("Please input the proper choice (yes/no)\n"); goto choose;
        }
    }
}

void Search(char info[]) /*completed*/
{
    int k = 0;
    int i;
    int j;
    int snum;
    int same;
    slength = -1;
    for (; k < 100; k++)slist[k] = 0;
    if (info[0] > 47 && info[0] < 58)
    {
        snum = 0;
        for (i = 0; i < strlen(info); i++)
        {
            snum *= 10;
            snum += info[i] - '0';
        }
        for (i = 0; i <= listlength; i++)if (usrlist[i].id == snum || usrlist[i].class == snum)slist[++slength] = i;
    }
    else
    {
        for (i = 0; i <= listlength; i++)if (strlen(info) == strlen(usrlist[i].name))
        {
            same = 1;
            for (j = 0; j < strlen(info); j++)if (info[j] != usrlist[i].name[j])
            {
                same = 0;
                break;
            }
            if (same)slist[++slength] = i;
        }
    }
}

/*create primary module*/
void Inputf() /*completed*/
{
    printf("You are trying to Input info\n");
    int irun = 1;
    while (irun)
    {
        listlength++;
        int tmp = listlength;
        printf("Id ");
        scanf("%d", &usrlist[tmp].id);
        getchar();
        printf("class ");
        scanf("%d", &usrlist[tmp].class);
        getchar();
        printf("name ");
        scanf("%49s", usrlist[tmp].name);
        getchar();
        printf("score1 ");
        scanf("%f", &usrlist[tmp].score[0]);
        getchar();
        printf("score2 ");
        scanf("%f", &usrlist[tmp].score[1]);
        getchar();
        printf("score3 ");
        scanf("%f", &usrlist[tmp].score[2]);
        getchar();
        usrlist[tmp].total_score = usrlist[tmp].score[0] + usrlist[tmp].score[1] + usrlist[tmp].score[2];
        irun = Mycontinue(irun);
    }
}

void Deletef() /*completed*/
{
    int drun;
    char info[50];
start:
    printf("You are trying to delete info\n");
    if (listlength == 0)printf("There is only one data,please add some new\n");
    else if(listlength == -1)printf("There is no data,please add some new\n");
    else
    {
        drun = 1;
        scanf("%49s", info);
        Search(info);
        int i;
        int j;
        for (i = 0; i <= listlength; i++)for (j = 0; j <= slength; j++)if (i == slist[j])usrlist[i].id = -1;
        tmplength = -1;
        for (i = 0; i <= listlength; i++) if (usrlist[i].id + 1)tmplist[++tmplength] = usrlist[i];
        listlength = -1;
        for (i = 0; i <= tmplength; i++)usrlist[++listlength] = tmplist[i];
        Outputf();
        drun = Mycontinue(drun);
        if (drun)goto start;
    }
}

void Selectf() /*completed*/
{
    int srun;
    char info[50];
    int i;
    int j;
    int fit;
    printf("You are trying to select info\n");
    if (listlength == -1)printf("There is no data,please add some new\n");
    else
    {
        srun = 1;
        while (srun)
        {
            scanf("%49s", info);
            Search(info);
            for (i = 0; i <= listlength; i++)
            {
                fit = 0;
                for (j = 0; j <= slength; j++)if (i == slist[j])
                {
                    fit = 1;
                    break;
                }
                if (fit)printf("%d %d %s %.1f %.1f %.1f %.1f\n", usrlist[i].id, usrlist[i].class, usrlist[i].name, usrlist[i].score[0], usrlist[i].score[1], usrlist[i].score[2], usrlist[i].total_score);
            }
            srun=Mycontinue(srun);
        } 
    }
}

void Orderf() /*completed*/
{
    tmplength = -1;
    int idmin;
    int classmin;
    int i;
    int j;
    printf("You are trying to Make things orderd\n");
    while (tmplength < listlength)
    {
        idmin = INT_MAX;
        classmin = INT_MAX;
        for (i = 0; i <= listlength; i++)if (usrlist[i].class < classmin)classmin = usrlist[i].class;
        for (i = 0; (i <= listlength); i++)if ((usrlist[i].id < idmin) && (classmin == usrlist[i].class))
        {
            idmin = usrlist[i].id;
            j = i;
        }
        tmplist[++tmplength] = usrlist[j];
        usrlist[j].id = INT_MAX;
        usrlist[j].class = INT_MAX;
    }
    listlength = -1;
    for (i = 0; i <= tmplength; i++)usrlist[++listlength] = tmplist[i];
    Outputf();
}

void Outputf() /*completed*/
{
    int index = -1;
    printf("You are trying to Output info\n");
    while (index < listlength)
    {
        index++;
        printf("%d %d %s %.1f %.1f %.1f %.1f\n", usrlist[index].id, usrlist[index].class, usrlist[index].name, usrlist[index].score[0], usrlist[index].score[1], usrlist[index].score[2], usrlist[index].total_score);
    }
}

void Quitf() /*completed*/
{
    printf("You are about to Quit\n");
    run = 0;
}


/*create main module*/
void mainLoop()
{
    while (run)
    {
        printf("1.input\n");
        printf("2.delete\n");
        printf("3.select\n");
        printf("4.order\n");
        printf("5.output\n");
        printf("6.quit\n");
        printf("Please input your opinion\n"); 
        char cin = getchar();
        getchar();
        switch (cin)
        {
        case '1':Inputf(); break;
        case '2':Deletef(); break;
        case '3':Selectf(); break;
        case '4':Orderf(); break;
        case '5':Outputf(); break;
        case '6':Quitf(); break;
        default:printf("Wrong input\n"); break;
        }
    }
}

/*create main function*/
int main()
{
    mainLoop();
    return 0;
}