Thread: Help this noob get string input

Hey guys,

I'm starting computer science at uni this year and I'm teaching myself some C using online resources.

I'm trying to get a string input from a user in the console and save it into a char array, using scanf_s. This is what I have so far :

Code:

#include <stdio.h>
#include <string.h>


int main()
{
    char str[50];


    printf("Enter a word : ");
    scanf_s("%s", str);


    getchar();
    return 0;
}

I used 'scanf_s' because I'm using visual studio and it forces you to. When I run the propgram, enter a string and press enter it crashes and I get a visual studio error (not an output error) that says :

Unhandled exception at 0x654D3FD4 (msvcr120d.dll) in Practice2.exe: 0xC0000005: Access violation writing location 0x00B70000.

When doing it with a single char and %c it's fine but when I try to save a string it crashes.

Weird thing is, even when copy+pasting working online examples of saving strings in this manner it crashes with this error message. I don't know if it's Visual Studio or something I'm missing. I've been trying different things for ages with no success . Any help would be great!

Cheers,

-Dinipants

https://msdn.microsoft.com/en-us/lib...v=vs.120).aspx

Unlike scanf and wscanf, scanf_s and wscanf_s require the buffer size to be specified for all input parameters of type c, C, s, S, or string control sets that are enclosed in []. The buffer size in characters is passed as an additional parameter immediately following the pointer to the buffer or variable.

You specified an input parameter of type 's', therefore you need to pass in the buffer size.

The documentation gives an example as well:

Code:

char s[10];
scanf_s("%9s", s, _countof(s)); // buffer size is 10, width specification is 9