scanf can't read spaces if I use "%s" and the output is not what I want if I use "%[^\n]"

Asked May 27 '22 at 14:08

Active May 27 '22 at 14:15

Viewed 23 times

I've been trying many different variations of "%[^\n]" to make my code work so that it can read spaces but none has work so far.

void details(Person *persondetails){

    printf("Enter your name: ");
    scanf("%[^\n]", persondetails->name);

    printf("Enter your phone number: ");
    scanf("%s", persondetails->phoneNum);
}

This is the output:

Enter your name: Enter your phone number:

Expected output would obviously be if I were use to "%s" like normal. Would love some help.

edited May 27 '22 at 14:15

John Kugelman

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asked May 27 '22 at 14:08

runningchris

and... you're initialising these `Person`s how? How are you calling the `details()` method? – Shark May 27 '22 at 14:17
1

runningchris, Post definitions of `persondetails->name, persondetails->phoneNum` and input used. Even better, a [mcve]. – chux - Reinstate Monica May 27 '22 at 14:18
1

runningchris, "but none has work so far." --> Checking the return value of `scanf()` is a good first step in making code that checks itself. – chux - Reinstate Monica May 27 '22 at 14:20
1

@runningchris Insert a leading space in the format string before % scanf(" %[^\n]", persondetails->name); – Vlad from Moscow May 27 '22 at 14:21
@runningchris No at all. You are welcome.:) – Vlad from Moscow May 27 '22 at 14:26
1

Tip for your next program: If you're at the point in your career where you needed to use `%[^\n]`, it means you're at the point where it's [time to learn to use better input techniques than `scanf`](https://stackoverflow.com/questions/58403537). – Steve Summit May 27 '22 at 14:48

scanf can't read spaces if I use "%s" and the output is not what I want if I use "%[^\n]"

0 Answers0