Careercup1.1: Implement an algorithm to determine if a string has all unique characters. What if you cannot use additional data structures?

gistfile1.txt

/*
 * test.cpp
 *Implement an algorithm to determine if a string has all unique characters. What if you cannot use additional data structures?
 *  Created on: 2013-5-4
 *      Author: Fred
 */

#include <iostream>
#include <string>

using namespace std;

bool chk_unique(string str){
  int i,j;
	int length = str.length();
	for(i=0;i<length;i++){
		for(j=i+1;j<length;j++)
			if(str[i]==str[j]) return false;
	}
	return true;
}


int main() {
	string test_str1="asloiwzxc";
	cout<< chk_unique(test_str1);
	string test_str2="slsoialow";
	cout<< chk_unique(test_str2);

}