DNA Sequence

/*
* <summary> Matches all of "seq1" concurrently with "seq2" </summary>
* <params> "seq1", "seq2" = Two strings containing the DNA sequence </params>
* <return>
*   "1" : If the entire "seq1" matches with "seq2" concurrently
*   "0" : Otherwise
* </return>
* <precond> Both "seq1" and "seq2" are strings hence should be null-terminated </precond>
*/
int match (char seq1[], char seq2[])
{
     char correctSequence[20];
     int i = 0, seq1_length = strlen(seq1);

     /* Generate the expected matching sequence of "seq1" and store into "correctSequence" */
     while(i < seq1_length)
     {
          switch(seq1[i])
          {
               case 'A' :
                    correctSequence[i] = 'T';
                    break;
               case 'T' :
                    correctSequence[i] = 'A';
                    break;
               case 'C' :
                    correctSequence[i] = 'G';
                    break;
               case 'G' :
                    correctSequence[i] = 'C';
                    break;
           }//end of switch
     }//end of while

     /* Terminate with Null */
     correcttSequence[i] = '\0';

     /* Use the substring function to determine a match */
     return strstr(seq2, correctSequence) != NULL ? 1 : 0;
}