+ 2

Unable to key-in full name

Hi im doing a C language program. I use: char name[30]; Printf ("Enter name:"); scanf("%d", &name); When i keyin my full name example, Dwayne Johnson.. The output only display "Dwayne"

16th Jun 2019, 1:21 PM
ARJ96
ARJ96 - avatar
15 odpowiedzi
+ 4
You can do it for example this way. https://code.sololearn.com/c00CGLH1x5Dx/?ref=app Hope it helps you 😉
16th Jun 2019, 1:40 PM
TheWh¡teCat 🇧🇬
TheWh¡teCat 🇧🇬 - avatar
+ 4
As stated here[1], the use of `[^characters]` specifier or "negated scanset" has described as a format specifier to accept user's input up to the first occurrence of the `character` being indicated inside the brackets. It actually a dangerous way to perform such operation with a fixed buffer due to the possibility of buffer overflow. Also, the compiler would truly frown about the fact that the variable `name` has a format as `char (*)[30]` instead of `char *` and it somehow warns us to reconsider our approach and make it safe. However, if we are persistent to make our code vulnerable, there's one last resort to tell the input stream about the limitation of our buffer like this scanf("%28[^\n]", name); Here, any input with a length above 28 characters would be trimmed out. (29th character is '\0'). [1] http://www.cplusplus.com/reference/cstdio/scanf/
16th Jun 2019, 3:02 PM
To Seek Glory in Battle is Glorious
To Seek Glory in Battle is Glorious - avatar
+ 3
Hi TheWh¡teCat ! Thanks for your support! What's [^\n] for btw?
16th Jun 2019, 1:57 PM
ARJ96
ARJ96 - avatar
+ 3
ARJ96 , it matches everything in a string including whitespaces until line break is reached.
16th Jun 2019, 2:08 PM
TheWh¡teCat 🇧🇬
TheWh¡teCat 🇧🇬 - avatar
+ 3
This is a live example which shows us the point I mentioned earlier. If you have difficulty in understanding any part of the code, please feel free and ask. #include <stdio.h> int main() { char name[10]; printf ("Enter name:"); if ( scanf("%9[^\n]", name) ) printf("%s\n", name);; return 0; } Input: Hello, World! Output: Hello, Wo The output is 9 visible characters + one null character Live: https://rextester.com/ZIKY42960
16th Jun 2019, 3:29 PM
To Seek Glory in Battle is Glorious
To Seek Glory in Battle is Glorious - avatar
+ 2
Thanks Théophile I'll try that out later on
16th Jun 2019, 1:58 PM
ARJ96
ARJ96 - avatar
+ 2
TheWh¡teCat how about integer? I want to key in my ID. How to declare that?
16th Jun 2019, 2:09 PM
ARJ96
ARJ96 - avatar
+ 2
For example 75890-123-4567
16th Jun 2019, 2:10 PM
ARJ96
ARJ96 - avatar
+ 2
ARJ96 , you can read it as string. Look again in the code with added id part. https://code.sololearn.com/c00CGLH1x5Dx/?ref=app
16th Jun 2019, 2:56 PM
TheWh¡teCat 🇧🇬
TheWh¡teCat 🇧🇬 - avatar
+ 2
ARJ96 , you are welcome 😉
16th Jun 2019, 3:04 PM
TheWh¡teCat 🇧🇬
TheWh¡teCat 🇧🇬 - avatar
+ 1
And with fgets : fgets(&name, 30, stdin);
16th Jun 2019, 1:55 PM
Théophile
Théophile - avatar
+ 1
TheWh¡teCat any ideas?
16th Jun 2019, 2:17 PM
ARJ96
ARJ96 - avatar
+ 1
My friend TheWh¡teCat you're my saviour!! TQVM!!!
16th Jun 2019, 2:59 PM
ARJ96
ARJ96 - avatar
+ 1
I thought for number could use int but looks like using char solved my problem!
16th Jun 2019, 2:59 PM
ARJ96
ARJ96 - avatar
+ 1
To Seek Glory in Battle is Glorious Thanks! I'm still a bit blur on your explanation. I hope I'll get to understand that.
16th Jun 2019, 3:07 PM
ARJ96
ARJ96 - avatar