Partial array output includes garbage

manpreet Best Answer 2 years ago

Most of my experience is limited to SQL scripting for DBA functions. I am a security specialist and provide help to others on those topics, but I am learning C to aid in those other endeavors. I've been reading books, writing small programs, and expanding the difficulty level as I go. This is the first time I've had to reach out for help. I apologize if this has been asked, but I did search first and didn't find anything.

So far, my programs have always returned only the valid data from partially filled arrays. This particular one is not behaving the same even though I'm using the same for statement I have previously used with success. At this point I must have tunnel vision because I cannot seem to see where this is failing.

If there are fewer than 20 inputs, the printf output displays the remaining values with garbage. It would be greatly appreciated if someone could provide some guidance on what I'm overlooking. Thank you in advance.

#include 
#include 
#include 

struct grade
{
    int id;
    int percent;
};

#define maxCount 100

int main()
{
    int *grade;
    struct grade gradeBook[maxCount];
    int count = 0;
    char YN;
    int i;

    for(i = 0; i < maxCount; i++)
        {
            printf("Enter ID:  ");
            scanf("%d", &gradeBook[i].id);

            printf("Enter grade from 0-100: ");
            scanf("%d", &gradeBook[i].percent);
            count++;

            // Prompt to continue, break if done
            printf("Do you want to Continue? (Y/N)");
            scanf(" %c", &YN);
            if(YN == 'n' || YN == 'N')
                {
                break;
                }
        }

void sort(struct grade gradeBook[],int cnt)
{
    int i, j;
    struct grade temp;

    for (i = 0; i < (cnt - 1); i++)
    {
        for (j = (i + 1); j < cnt; j++)
        {
            if(gradeBook[j].id < gradeBook[i].id)
            {
                temp = gradeBook[j];
                gradeBook[j] = gradeBook[i];
                gradeBook[i] = temp;
            }
        }
    }
}

printf("Grades entered and ordered by ID:  \n");
for (i = 0; i < count; i++)
    {
        printf("\nID:%d, Grade: %3d\n",
                                                

                                                                                                        
                                                    
                                                
                                                


                                                    

                                                        
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