Databases
StackOverflow2013
Postsdbo
POPointer to structure
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POPointer to structure
    primarykey
    data
    text
    <p>I am new to pointers and trying to use a pointer to the structure. But after the first entry, my program crashes. Kindly assist me.</p> <p>Here's the structure definition: </p> <pre><code>struct students{//structure students definition char name[20]; char RegNo[15]; char CourseUnit[10]; int score; char grade; }; </code></pre> <p>The grade should not be entered by the user but instead computed by the program. </p> <p>Here's my code so far I have written:</p> <pre><code>int main()//start of main { struct students *myStudPtr,myStud[SIZE]; myStudPtr=&amp;myStud[SIZE]; int i;//declare variables int count; printf("How many students do you want to deal with?\n"); scanf("%d",&amp;i);//number of entries for(count=1;count&lt;=i;count++) { printf("Enter student's name\n"); scanf("%s",&amp;(*myStudPtr).name); printf("Enter the student's registration number\n"); scanf("%s",&amp;(*myStudPtr).RegNo); printf("Enter the course unit\n"); scanf("%s",&amp;(*myStudPtr).CourseUnit); printf("Enter the marks scored\n"); scanf("%d",&amp;(*myStudPtr).score); } printf("NAME\tREGISTRATION\t\tCOURSE UNIT\tSCORE\t\tGRADE\n");//tabulates the output printf("%s\t", myStudPtr-&gt;name); printf("%s\t\t", myStudPtr-&gt;RegNo); printf("%s\t", myStudPtr-&gt;CourseUnit); printf("%d\t\t", myStudPtr-&gt;score); if(myStudPtr-&gt;score&gt;100) { printf("Invalid\n"); } else if(myStudPtr-&gt;score&lt;40) { printf("FAIL\n"); } else if(myStudPtr-&gt;score&lt;50) { printf("D\n"); } else if(myStudPtr-&gt;score&lt;60) { printf("C\n"); } else if(myStudPtr-&gt;score&lt;70) { printf("B\n"); } else if(myStudPtr-&gt;score&gt;70) { printf("A\n"); } else { printf("Invalid"); } return 0; } </code></pre> <p>Kindly assist.Thanks in advance.</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USGrijesh Chauhan
    1. USuser2686010
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    3. PL
      singulars
      1. LTLinked
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POPointer to structure
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POPointer to structure
      1. This table or related slice is empty.
      1. VTDownMod
    3. VO
      singulars
      1. POPointer to structure
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. COGoing out of bounds on an array is undefined behaviour. That's not nearly the only problem, though.
      singulars
      1. POPointer to structure
      1. USchris
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload