Thread: need help to edit

  1. #1
    Registered User
    Join Date
    Feb 2010

    need help to edit

    hi i have a program that is supposed to put in the number of student and marks and printf them out on the screen. this is not working can somone tell me what i did wrong
          char student[2][9];
          float marks[2][3];
          int numb,i,j;
          printf("how many student");
          printf("student name");
                printf("enter the mark");
         printf("%\n\n", "Student", "PRG", "DGS", " MTH", " ECR", " GED");
         for (i = 0; i < numb; i++) {
         printf("%s", student[i]);
          for (j = 0; j < 5; j++) {
           printf("%d ", marks[i][j]);

  2. #2
    Super Moderator
    Join Date
    Sep 2001
    printf("%\n\n", "Student", "PRG", "DGS", " MTH", " ECR", " GED");
    This isn't right - the format string should have a %s for each string you want to insert into the output.

    I also suspect you're having a problem with your array bounds - you declare marks[2][3], but there are times in your loops when second index can increase up to 5.

    Also - you might consider posting the actual output and how it is different from what you expected - it makes it a lot easier for us to pinpoint the biggest problems.

    edit: Just wanted to point out that conio.h and getch() are not standard C - they just happen to be provided by your compiler. There's nothing wrong with using them when you're learning C - but I just think it's important to know what's standard and what isn't.

  3. #3
    Registered User
    Join Date
    Feb 2010
    someonme help me

  4. #4
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    > for(j=0;j<5;j++)
    How big is your array?

    > scanf("%i",&marks[i][j]);
    What is the correct format for reading floats?
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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