slipped my mind ... cleaning up strings

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...

Code:

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const int maxStrLen(100);
.
.
.
char userInput[maxStrLen];
cin.getline(userInput, maxStrLen, '\n');
.
.
.

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So, how do I get rid of leading or trailing whitespace? whitespace includes the space character as well as tab.

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!

you may be a stoned coder, but you still know your ****. thanks :D

<edit> dangit, vB censored swearing. the **** above should say $ |-| | +. i guess that's how you write it without actually saying the word...</edit>

You could use this code too:

PHP Code:

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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; 


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Then you don't have to use a second buffer.

correct me if im wrong Gliptic but isn't memcpy() undefined behaviour if start and destination overlap as they almost certainly will do here.

> 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.