編程算法 - 字符串的排列 代碼(C)

字符串的排列 代碼(C)

題目: 輸入一個字符串, 打印出該字符串中字符的所有排列.

方法: 使用遞歸依次交換位置, 打印輸出.

代碼:

/*
 * main.cpp
 *
 *  Created on: 2014.6.12
 *      Author: Spike
 */

/*eclipse cdt, gcc 4.8.1*/

#include 

void Permutation(char* pStr, char* pBegin);

void Permutation(char* pStr)
{
    if(pStr == NULL)
        return;

    Permutation(pStr, pStr);
}

void Permutation(char* pStr, char* pBegin)
{
    if(*pBegin == '')
    {
        printf(%s
, pStr);
    }
    else
    {
        for(char* pCh = pBegin; *pCh != ''; ++ pCh)
        {
            char temp = *pCh;
            *pCh = *pBegin;
            *pBegin = temp;

            Permutation(pStr, pBegin + 1);

            temp = *pCh;
            *pCh = *pBegin;
            *pBegin = temp;
        }
    }
}

void Test(char* pStr)
{
    if(pStr == NULL)
        printf(Test for NULL begins:
);
    else
        printf(Test for %s begins:
, pStr);

    Permutation(pStr);

    printf(
);
}

int main(void)
{
    char str[] = abc;
    Test(str);

    return 0;
}

Test for abc begins:
abc
acb
bac
bca
cba
cab