CODEWITHSUNDEEP
cprintf
JC8
JC8

Reputation: 43

For some reason, printf function adds a space to what I want to display

I'm trying to display text in columns, but on the second line of the output a space gets added. Am I doing anything wrong? (The entries do not contain a space before the string) Here are the functions involved:

add(List *book)
{
    Contact *runner = book->una;
    Contact *node = (Contact *) malloc(sizeof(Contact));

if (node == NULL);
else {
    printf("Add a contact\n");
    printf("Enter the first name: ");
    scanf("%s", node->fname);
    printf("Enter the last name: ");
    scanf("%s", node->lname);
    printf("Enter the mobile number: ");
    scanf("%s", node->number);
    printf("\nContact added!\n\n");
    node -> next = NULL;
    if(book->una == NULL){
        book->una = node;
    }
    else
    {
        while( runner->next != NULL)
        {
            runner = runner->next;
        }
        runner->next = node;
    }
}
}

    display(List *book)
{
    Contact *runner = book -> una;
    if(runner == NULL)
    {
        printf("%20s", "PHONEBOOK EMPTY!");
        return;
    }
    printf("Contact list\n");
    printf("%-15s%-15s%-15s", "First Name", "Last Name", "Mobile number\n");
    while( runner != NULL)
    {
        printf("%-15s%-15s%-15s\n", runner->fname, runner->lname, runner->number);
        runner = runner->next;
    }
}

/*An example output basically turns out like this:

First Name         Last Name         Mobile Number
 James              Harrison          123456
Wendy              Barnes            00000
Cam                Rodriguez         575938*/

Any input data will be printed as shown above.

Upvotes: 2

Views: 67

Answers (1)

Iharob Al Asimi
Iharob Al Asimi

Reputation: 53036

You should put the \n in the format string instead of the field. Since Mobile number has 13 characters, plus the \n 14 and one space is added as padding for the %-15s, it goes after the \n hence, in the next line.

Upvotes: 9

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