title: Function that finds whether 2 string are made from same words
body: <p>I need to create a function in C, which finds out if 2 strings are made from same words. As can be seen in current code, I loaded each string in separate array. I made it that in the array there are words, all in lower case letters with just 1 space between each word and without all non-alpha characters. I though, that I could just sort the string and call strcmp on them, but it can't be done so, because of the reason, that there can be strings such as "dog dog dog cat" and "dog cat" , these strings are from same words, so the function should return 1, but it wouldnt if just sorted and used strcmp. So i though, I could  merge all duplicated words in 1 and then sort and strcmp, but there is still one problem, that when there would be words such as "dog" and "god" , these are 2 different words, but the function would still take them as same after sorting. 
  "dog dog dog cat" "dog cat" - same words
  "HI HeLLO!!'" "hi,,,hello hi" - same words
  I would be very thankful for any help. I really don't know how to create it, I sat at it for quite some time and still can't figure it.</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  #include &lt;stdlib.h&gt;
  #include &lt;string.h&gt;
  #include &lt;ctype.h&gt;
  
  int sameWords( const char * a, const char * b)
  {
  char * array1=NULL;
  char * array2=NULL;
  int length1=0, length2=0, i=0, j=0;
  while(a[i])
    {
    if(i&gt;=length1)
      {
        length1+=250;
        array1=(char*)malloc(length1*sizeof(char));
      }
    if(isspace(a[i]) &amp;&amp; !isspace(a[i-1]))
      {
        array1[i]=a[i];
      }
    if(isalpha(a[i]))
      {
        array1[i]=tolower(a[i]);
      }
    i++;
    }
  while(b[j])
    {
    if(j&gt;=length2)
      {
        length2+=250;
        array2=(char*)malloc(length2*sizeof(char));
      }
    if(isspace(b[j]) &amp;&amp; !isspace(b[j-1]))
      {
        array2[j]=b[j];
      }
    if(isalpha(b[j]))
      {
        array2[j]=tolower(b[j]);
      }
    j++;
    }
  }
  
  int main()
  {
  sameWords("This' is   string !!! ", "THIS stRing is !!  string ");
  return 0;
  }
  </code></pre>