OK ... if i read in a string, how do i get rid of any leading/trailing whitespace? here's how i am reading in the string...
So, how do I get rid of leading or trailing whitespace? whitespace includes the space character as well as tab.Code:const int maxStrLen(100); . . . char userInput[maxStrLen]; cin.getline(userInput, maxStrLen, '\n'); . . .
liberate tutamet ex inferis
loop through the array and use isspace() to check for whitespace and when you get a non-space char move them into a second array until the first '\0' . there you have it!
Free the weed!! Class B to class C is not good enough!!
And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi
you may be a stoned coder, but you still know your ****. thanks
<edit> dangit, vB censored swearing. the **** above should say $ |-| | +. i guess that's how you write it without actually saying the word...</edit>
liberate tutamet ex inferis
You could use this code too:
Then you don't have to use a second buffer.PHP Code:
long start=-1, len=0;
for(int i=0;i<maxStrLen;i++)
{
//Find start of string
if(!isspace(userInput[i]))
{
start = i;
break;
}
}
if(start != -1)
{
for(int i=strlen(userInput);i>0;i--)
{
//Find end of string
if(!isspace(userInput[i]))
{
len = i - start + 1;
break;
}
}
//Move the text to the beginning of the buffer
memcpy(userInput, &userInput[start], len);
}
//Put in terminator
userInput[len] = 0;
correct me if im wrong Gliptic but isn't memcpy() undefined behaviour if start and destination overlap as they almost certainly will do here.
Free the weed!! Class B to class C is not good enough!!
And the FAQ is here :- http://faq.cprogramming.com/cgi-bin/smartfaq.cgi
> but isn't memcpy() undefined behaviour if start and destination overlap
Yes this is correct
Use memmove if you want to copy overlapping memory blocks.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
