flip

I am learning C and I am trying to flip a string that contains
"hello" into "olleh"

how can I do that?

There are many ways.... why not try and think of some yourself first :)

Remember that the string is just an array of chars......
And remember that many people have asked the question before you, so the answer is going to be lying around somewhere.

Have a go, and post some code when you are stuck.

start at the end of the string and work your way towards the beginning, printing off characters as you go.

Code:

---

int flip_str_to_str(char *in,char *out) {
    char *pin,*pout;
    int len = strlen(in) ;

    pin = in ;
    pout = out+len;
    *(pout+1) = '\0';
    while( *pin) {
          *pout = *pin;
          pout--;
          pin++;
    }
    return 0;
}

---

Just make sure that 'in' buffer is long as 'out' buffer
or else out is going to ring the bell !!

Is there a way to do it in a much simpler way..I just started to learn C soPin iin/out is too advanced for me now!!!!

I want to find a way to rotate the string without having printf to do it!!!

Code:

---

void r(char*s)
{
    if(s&&*s!='\0')
    {
        r(s+1);
        printf("%c",*s);
    }
}

---

If this is homework, they'll likely not accept this answer, unless of course, you can actually explain what it does.

Quzah.

Haven't checked this one... (there could be mistakes
with strlen in my code..)

Code:

---

char input[] = "My Homework";
for (i=strlen(input)-1; i>=0; i--)
{
    printf("%c", input[i]);
}

---

This is just to give you an idea.

COOL PROGRAMS @ www.akilla.tk

oh, and also
int i
and all that..

Code:

---

char ISay[] = "Can't expect me to do all your homework";

---

Good luck

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