how to accept a carriage return ?

Here is my problem...

I want the user to be able to press enter and then the line of text to repeate

Code:

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

int main()
{
     char lol[20];
     while(1)
     {
          printf("command: ");
          scanf("%s", lol);
          if(strcmp(lol, "\n") == 0)
          {
            // reprint "command"
          }
      }
}

But... this does not work, that is my code basically. Or that is what i tried rather, I also tried "\r" but that didnt work and neither did EOF. N E ideas?

because you are using a while loop and you have set the condition to "while(1)," it will always be true, therefore, it is unneccassary to manuelly reset it. after it prints the char "lol," it will automaticly start the while again. remember, while is a loop for a reason.

Code:

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

int main()
{
     char lol[20];
     while(1)
     {
          printf("command: ");
          scanf("%s", lol);
          printf("&s\n", lol);
      }
}

theoreticly this should work, correct me if im wrong.

EDIT: Sorry, didnt realize what u meant at first. this doesnt really fix your problem. im on a mac, although i believe if
your on windows you can do...

Code:

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

int main()
{
     char lol[20];
     while(1)
     {
          printf("command: ");
          scanf("%s", lol);
          printf("&s\n", lol);
          system("PAUSE");
      }
}

although that may be wrong. macs pwn over windows. lol.

scanf ignores \n - it reads upto the \n and leaves \n in the input stream
to read whole line including \n use fgets (see the FAQ about details how to read from the stdin using fgets)

soo fgets will accept the carriage return, right and now wait for a stream or character or something like that?

And my example was not really the best looking back, the whole point of the example was to make so i can accept <enter> as i would a character and it would go to the next line. Like in the dos shell.

Maybe you meant to do something like this:

Code:

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

int main( void )
{
   char line[BUFSIZ];

   for(;;)
   {
      fputs("Please enter a string of characters.\n: ", stdout);
      fflush(stdout);
      if( fgets(line, sizeof line, stdin) != NULL  && line[0] != '\n' )
      {
         puts(line);
      }
      else if( line[0] == '\n' )
      {
         continue;
      }
      else
      {
         break;
      }
   }

   return 0;
}

Of course, now this means that the only way to stop the loop is to send EOF.

May be this will help you

Code:

#include<stdio.h>

int main()
{
    char str[80];
    
    printf("Enter Command :\\>");
    
    while(fgets(str, sizeof str, stdin) != NULL && *str != '\n' && *str != EOF)
    {
        printf("Your Command > %s", str);
        printf("Enter Command :\\>");
    }    
    
    printf("You are out\n");
    
    getchar();
    return 0;
}

/* my output
Enter Command :\>copy con hello
Your Command > copy con hello
Enter Command :\>dir
Your Command > dir
Enter Command :\>ipconfig
Your Command > ipconfig
Enter Command :\>
*/

ssharish2005