CODEWITHSUNDEEP
cstringscanfbuffer
Janjan
Janjan

Reputation: 85

Behavior of scanf when reading strings in C

I would like to know what does the compiler do with the whitespaces, newline character when using scanf("%s"). I know that scanf("%s") cannot read whitespaces and newline character.

For example if I enter

hi          question

or

hi

        question

scanf("%s") reads it without problems.

Below is the code that I am referring to

#include <stdio.h>

int main () {
    char str [2][50];
    scanf("%s", str[0]);
    scanf("%s", str[1]);
    printf("%s\n", str[0]);
    printf("%s\n", str[1]);
    return 0;
}

Upvotes: 1

Views: 58

Answers (1)

nivpeled
nivpeled

Reputation: 1838

scanf documentation online:

Whitespace character: the function will read and ignore any whitespace characters encountered before the next non-whitespace character (whitespace characters include spaces, newline and tab characters -- see isspace). A single whitespace in the format string validates any quantity of whitespace characters extracted from the stream (including none).

source

Upvotes: 1

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