How to make output of printf in one line

Question

(Can't use space and can't use: if,switch,.....case) I have my code:

#include <stdio.h>

int main()
{
    int dd, mm, yyyy;

    printf("Podaj date (w formacie dd-mm-yyyy):");
    scanf("%d-%d-%d", &dd, &mm, &yyyy);
    printf("Day:%02d\nMonth:%02d\nYear:%04d\n",dd,mm,yyyy);

    return 0;
}

And output looks like this:

Podaj date:06-08-0009
Day:06
Month:08
Year:0009

And how do it like this

Podaj date: 06-08-0009
Day:       06
Month:     08
Year:    0009

@klutt: I don't think that actually applies since they also need leading zeroes here. — Bill Lynch, Nov 01 '21 at 14:43
Please read the documentation of `printf()` or use a decent C book. — the busybee, Nov 01 '21 at 14:43
@Vladyslav: I don't believe there is a mechanism to do this in printf if you also need leading zeroes. — Bill Lynch, Nov 01 '21 at 14:44
Read the doc! You might find `"%*s"` with an empty string (or a string with a single space) most vaulable. -- Oh, you need to know the number of spaces. — the busybee, Nov 01 '21 at 14:45
@Vladyslav If you cannot add space, then you should include that (and all other) requirements in your question. — klutt, Nov 01 '21 at 14:46
Use `sprintf()` to format the numbers into strings, then print those strings in `%-s` fields with appropriate widths. — Barmar, Nov 01 '21 at 14:51

Ted Lyngmo · Accepted Answer · 2021-11-01T14:52:40.887

2

You could give the fixed parts of the format string as arguments instead and decide on the width of each in the format string:

printf("%-11s%02d\n%-11s%02d\n%-9s%04d\n", "Day:", dd, "Month:", mm, "Year:", yyyy);
//       ^^^        ^^^        ^^^
//        |          |        "Year:"
//        |         "Month:"
//        |
//       "Day:" - left adjusted, 11 chars

Also, always check that scanf succeeds:

if(scanf("%d-%d-%d", &dd, &mm, &yyyy) == 3) {
    printf("%-11s%02d\n%-11s%02d\n%-9s%04d\n", "Day:", dd, "Month:", mm, "Year:", yyyy);
}

edited Nov 01 '21 at 14:52

answered Nov 01 '21 at 14:51

Ted Lyngmo

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Oh my god,love u, thanks!! – Vladyslav Nov 01 '21 at 14:52

score 0 · Answer 2 · answered Nov 01 '21 at 14:53

void scanAndPrint(unsigned nspaces)
{
    int dd, mm, yyyy;

    printf("Podaj date (w formacie dd-mm-yyyy):");
    scanf("%d-%d-%d", &dd, &mm, &yyyy);
    printf("\nDay:%*s%02d\nMonth:%*s%02d\nYear:%*s%04d\n", nspaces - 2 - (int)sizeof("DAY"),"", dd,nspaces - 2 - (int)sizeof("MONTH"),"", mm,nspaces - 4 - (int)sizeof("YEAR"),"", yyyy);

}

https://godbolt.org/z/Kj1aoEazb

How to make output of printf in one line

2 Answers2