按照字典序打印所有的字符串
比如给abc
要打印abc,acb,bac,bca,cab,cba。
void AA(char* pStr,char* pBegin) { if(*pBegin == '\0') cout << pStr << endl; else { for(char* ptemp = pBegin;*ptemp != '\0';ptemp++) { if(ptemp != pBegin) { char a = *ptemp; *ptemp = *pBegin; *pBegin = a; } AA(pStr,pBegin+1); if(ptemp != pBegin) { char a = *ptemp; *ptemp = *pBegin; *pBegin = a; } } } } int main() { char arr1[10] = {"abcd"}; AA(arr1,arr1); return 0; }