argv and sscanf problem

[fortytwo]

Hi,

I have a bit of a problem passing command line stuff to my program in Linux. Here is the program:

[tt]
#include <stdio.h>
#include <string.h>

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

//here
sscanf(string, &quot;%s&quot;, argv[1]);
printf(&quot;Plaintext: %s\n&quot;, string);

printf(&quot;Plaintext: %s\n&quot;, argv[1]);
return 0;
}
[/tt]

If I comment out the two lines after the //here comment, the program runs fine, and prints out the second element of the arguments. If I uncomment the two lines after the //here comment I het junk printed out for *both* of the printf statements! Anyone any ideas why this might be?

Thanks
Will.

will@hellacool.co.uk

http://home.hellacool.co.uk/

 

[tipmiser]

Homework?

 

[itsgsd]

You're using sscanf wrong, your statement should be:

sscanf(argv[1],"%s",string);

Good luck.

 

[obislavu]

You should say :

sscanf(argv[1], "%s", string);
or 
sprintf(string,"%s",argv[1]);

-obislavu-

 

[tipmiser]

I think this is what you want for the next two lines after the //here:

printf(&quot;Enter something: &quot;
scanf( &quot;%s&quot;, &string);

 

[fortytwo]

Thanks everyone, I had the arguments to sscanf wrong, this is correct:
[tt]
sscanf(argv[1],&quot;%s&quot;,string);
[/tt]
I was pulling my hair out Not homework though, writing a simple program to help decrypt ceasar ciphers just for fun.

Will.

will@hellacool.co.uk

http://home.hellacool.co.uk/