20141202_KUAS_VisualC++_Exam08

/***************************************/
/** 20141202 Exam 08                  **/
/** Maker  : Yan                      **/
/** E-Mail : [email protected] **/
/** Date   : 2014/12/02 am.11:30      **/
/***************************************/

#include <Stdio.h>
#include <stdlib.h>

struct grade{
    int id;
    int cht;
    int eng;
    int math;
    int avg;
};

int main(int argc, char const *argv[])
{
    FILE *fptr = fopen("input.txt", "r");
    if(fptr == NULL)
    {
        printf("**** ERROR ****\n");
        return 0;
    }
    struct grade all_grade[100];
    int counter = 0;
    while(!feof(fptr))
    {
        fscanf(fptr, "%d%d%d%d\n", &all_grade[counter].id, &all_grade[counter].cht, \
                                   &all_grade[counter].eng, &all_grade[counter].math);
        all_grade[counter].avg = (float)(all_grade[counter].cht + all_grade[counter].eng + all_grade[counter].math) / 3;
        counter++;
    }
    while(1)
    {
        for(int i = 0; i < counter; i++)
            printf("%d: cht = %d, eng = %d, math = %d, avg = %d\n", all_grade[i].id, all_grade[i].cht, all_grade[i].eng, all_grade[i].math, all_grade[i].avg);

        printf("What ID do you want to search and change value: ");
        int _search = 0;
        scanf("%d", &_search);
        if(_search == -1)
            break;

        for(int i = 0; i < counter; i++)
        {
            if(all_grade[i].id == _search)
            {
                printf("Id: %2d\n", all_grade[i].id);
                printf("Change cht grade: ");
                scanf("%d", &all_grade[i].cht);
                printf("Change eng grade: ");
                scanf("%d", &all_grade[i].eng);
                printf("Change math grade: ");
                scanf("%d", &all_grade[i].math);

                all_grade[i].avg = (float)(all_grade[i].cht + all_grade[i].eng + all_grade[i].math) / 3;
            }
        }
    }
    return 0;
}