具体请参看这里：

http://blog.csdn.net/morewindows/article/details/7370155

http://blog.csdn.net/hackbuteer1/article/details/7462447

#include <assert.h>
#include <iostream>

using std::cout;
using std::endl;

//在交换过程中，没有改变指针的值，
//而是改变指针所指向的内容
void Permutation(char* pStr, char* pBegin)
{
    assert(pStr && pBegin);

    if(*pBegin == '\0')
    {
        printf("%s\n",pStr);
    }
    else
    {
        for(char* pCh = pBegin; *pCh != '\0';)
        {
            std::swap(*pBegin,*pCh);//交换a和b的值
            Permutation(pStr, pBegin+1);
            std::swap(*pBegin,*pCh);
            pCh++;
        }
    }
}

int main()
{
    char str[] = "abc";
    cout<<"str pointer to:"<<*str<<endl;
    printf("str=%s\n",str);
    Permutation(str,str);//传递指针
    system("pause");
    return 0;
}

结果：

str pointer to:a

str=abc

abc

acb

bac

bca

cba

cab

请按任意键继续. . .

 

Process returned 0 (0x0)   execution time : 2.062 s

Press any key to continue.

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