How do I prevent a new line(\n) using fgets in a multidimensional array?

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I am building a program to print names (where names can contain spaces also). I am noticing that my code is printing a new line(\n), then it is doing a tab space (\t). But I don't want it to have a new line. How can I prevent it? Also, I tried using scanf. With scanf it is working (means the expected output is coming), so 1 thing is for sure is that it is not a problem of strings but a problem of fgets.

What I have tried:

My code:

#include <stdio.h>

int main()
{
    char name[3][10];
    for (int i = 0; i < 3; i++)
    {
        printf("Enter name %d\n", i + 1);
        fgets(name[i], 20, stdin);
    }
    for (int i = 0; i < 3; i++)
    {
        printf("%s\b\t", name[i]);
    }
    

    return 0;
}

Now the output is like this:

Enter name 1
Anant G
Enter name 2
Manas K
Enter name 3
Nilesh K S 
Anant G
        Manas K
        Nilesh K S

But I want the output to be as follows

Enter name 1
Anant G
Enter name 2
Manas K
Enter name 3
Nilesh K S 
Anant G        Manas K        Nilesh K S

Posted 8-Nov-21 19:13pm

Member 15423535

Updated 9-Nov-21 5:57am

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Peter_in_2780 9-Nov-21 1:30am

fgets() is defined to include the trailing newline, so just strip the last character you get.

Member 15423535 9-Nov-21 1:32am

How can I do it? Can you please explain? I will be grateful!

Peter_in_2780 9-Nov-21 1:50am

You need to read up on C string handling and string functions. There are several ways you could do it.

Shao Voon Wong 9-Nov-21 2:18am

int len = strlen(name[i]);
if (len > 0 && name[i][len - 1] == '\n')
name[i][len - 1] = '\0';

Member 15423535 9-Nov-21 2:23am

Thanks this is working! I added this in my first for loop!

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OriginalGriff · Answer 1 · 2021-11-08T19:56:00

YOu need to remove the trailing newline:
Get the length of the string (strlen[^] will do it).
Make sure it it at least one.
Get the last character of the string: index the length minus one as C arrays use zero-based indexing.
If it's a newline '\n', replace it with a null character '\0'.

I'd write a function which accepted a char* parameter and returned a char* to do it as it's more flexible. I'd probably make it remove trailing space and tab characters as well, and likely make it work with both ends of the string ... and call it Trim

k5054 · Answer 2 · 2021-11-09T05:57:00

If you are using Linux you should probably use getline()[^] instead of fgets(). getline() reads and allocates a buffer, and returns the number of characters read. This means that there's no need to try to calculate the length of the buffer, and/or test the last character in the buffer to determine if its a newline or not

C

/* example reading a file using getline() */
/* assume we already have a FILE *input already open for reading */

#include <stdio.h>
#include <stdlib.h>

char *buff = NULL;   /* input buffer */
size_t bufflen = 0;  /* current size of input buffer */
ssize_t rlen;        /* number of bytes read from input */

while( (rlen = getline(&buff, &bufflen, input) > 0 ) {
   buff[rlen] = '\0';
   /* process input buffer */
}
free(buff);         /* dispose of input buffer when we no longer need it */

The bufflen parameter to getline() is the current allocated size of the buffer, which getline uses to reallocate only when necessary. An informal test shows that getline() to be about 30% faster than using fgets() and strlen().

How do I prevent a new line(\n) using fgets in a multidimensional array?

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