找字符串的所有组合

#include <iostream>
#include <vector>
#include <stdio.h>
#include <string.h>
using namespace std;




void Combination(char* string, int number, vector<char>& result)
{
    if(number == 0)
    {
        vector<char>::iterator iter = result.begin();
        for(; iter < result.end(); ++ iter)
            printf("%c", *iter);
        printf("\n");

        return;
    }

    if(*string == '\0')
        return;

    result.push_back(*string);
    Combination(string + 1, number - 1, result);
    result.pop_back();
    Combination(string + 1, number, result);
}
void Combination(char* string)
{
    if(string == NULL)
        return;

    int length = strlen(string);
    vector<char> result;
    for(int i = 1; i <= length; ++ i)
    {
        Combination(string, i, result);
    }
}
int main() {
	char a[]="abc";
	Combination(a);
	return 0;
}