DISQUS

adamo · 3 years ago

You have to make sure that:
name[99] = '';

Leo Soto · 2 years ago

It's vulnerable to buffer overflows :(

Jeffrey · 1 year ago

Use fflush(stdin); to avoid looping!?

Eric · 1 year ago

THANK YOU. Ive been searching forever online for this!!!!!!!!!!!! you rock

Aia · 1 year ago

>It’s vulnerable to buffer overflows
To avoid that declare a maximum field
if ( scanf("%99[^\n]", name) == 1) { /* do something */} will do it. However does leave still input in the stdin buffer if more than 99 keys where typed.


>Use fflush(stdin); to avoid looping!?
That's invoking undefined behavior.
fflush() is only for OUTPUT streams, and not for INPUT like stdin.

sd · 1 year ago

Hey thanks a lot for that piece of code! Works great!
The strange thing is that the string variable doesn't need a preceeding ampersand (&).
Quite surprising....I'd like to know how that happens...

getline to read input from a u · 1 year ago

[...] (what's surprising is that abc doesn't need an ampersand preceeding it) Got it from here and there are comments about scanf being vulnerable to buffer overflows. Is that true? So [...]

Luis Tellez · 1 year ago

fflush(stdin) works fine for the input, i have use it in many proyects i haver worked and havent given me any problems.

ashih · 10 months ago

thnx dear....

jessica · 10 months ago

you are awsom

Dan D. · 10 months ago

I wish I'd found this blog posting two hours ago.

Shailesh · 8 months ago

Awesome. This works great

Will · 8 months ago

Use fgets instead...

The version that is not vulnerable to buffer overflows is:

char name[100];

printf(”Enter the name:”);
fgets(name,100,stdin);

Hope that helps...

Anonymous · 7 months ago

[...] Datei lesen und an bestimmer Stelle verändern Am besten ist vielleicht, immer ein komplette Zeile einzulesen. Dann musst du immer prüfen, ob du nun an dem zu editierenden Block angekommen bist. Das kann man [...]

diapir · 6 months ago

Cool reminder. I used this thing to skip comments in a file :

// eat spaces
// match '#'
// capture and discard everything until end of line
fscanf(stream, " #%*[^\n]");

Cheers

sub · 5 months ago

i didn't get tis.... none of the codes worked for me,including the one containing regular expressions.
how do we read a line from the user in C.

ullas · 5 months ago

Hey this is not working.....

Bubba · 4 months ago

(To Sub)Two questions back:

Here is a simple snippet to answer your question:

#include

int main(int argc, char *argv[])
{
char first_name[100];

printf("What is your name? ");
gets(first_name);
printf("\nNice to meet you %s!",first_name);
return 0;
}


Try this, I hope it helps in some small way.....

Bubba · 4 months ago

Oddly,
The post deleted what was in the brackets after include (which was simply "stdio.h")

Bubba · 4 months ago

Or, we can just use

#include
int main()
{
char name[99];
printf("What is your name? ");
scanf("%s",&name);
printf("Hello, %s. How are you?\n",name);
return(0);
}

Same result.

Stepnowski · 3 months ago

I would like to see more blog entries like this one