C语言实现输入一个字符串后打印出该字符串中字符的所有排列

/* * Copyright (c) 2011 alexingcool. All Rights Reserved. */ #include <iostream>#include <algorithm>using namespace std;char array[] = {'a', 'b', 'c'};const int size = sizeof array / sizeof *array;void Perm(char *array, int pos, int last) {  if (pos == last) { copy(array, array + size, ostream_iterator<char>(cout, "")); cout << endl; }  else {  for(int i = pos; i <= last; i++) {   swap(array[i], array[pos]);   Perm(array, pos + 1, last);   swap(array[i], array[pos]);  }  }}void main(){ Perm(array, 0, 2);}