void allLexicographicRecur (char *str, char* data, int last, int index)
{
int i, len = strlen(str);
// One by one fix all characters at the given index and recur for the
// subsequent indexes
for ( i=0; i<len; i++ )
{
// Fix the ith character at index and if this is not the last index
// then recursively call for higher indexes
data[index] = str[i] ;
// If this is the last index then print the string stored in data[]
if (index == last)
printf("%s\n", data);
else // Recur for higher indexes
allLexicographicRecur (str, data, last, index+1);
}
}
/* This function sorts input string, allocate memory for data (needed for
allLexicographicRecur()) and calls allLexicographicRecur() for printing
all
permutations */
void allLexicographic(char *str)
{
int len = strlen (str) ;
// Create a temp array that will be used by allLexicographicRecur()
char *data = (char *) malloc (sizeof(char) * (len + 1)) ;
data[len] = '\0';
// Sort the input string so that we get all output strings in
// lexicographically sorted order
qsort(str, len, sizeof(char), compare);
// Now print all permutaions
allLexicographicRecur (str, data, len-1, 0);
// Free data to avoid memory leak
free(data);
}
// Needed for library function qsort()
int compare (const void * a, const void * b)
{
return ( *(char *)a - *(char *)b );
}
// Driver program to test above functions
int main()
{
char str[] = "ABC";
printf("All permutations with repetition of %s are: \n", str);
allLexicographic(str);
getchar();
return 0;
}
--
You received this message because you are subscribed to the Google Groups
"Algorithm Geeks" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/algogeeks?hl=en.
