#pragma once#include 
    
     #include 
     
      using namespace std;//itoa//int ==> string//10进制string itoa(int nNum){	int nSize = 128;	char* pStr = new char[nSize];	memset(pStr,0,nSize);	char* pCurr = pStr;	char* pBg = pCurr;	if(nNum < 0)	{		*pCurr = '-';		pCurr ++;		nNum = 0 - nNum;		pBg = pCurr;	}	while(nNum > 0)	{		*pCurr = nNum%10 + '0';		pCurr ++;		nNum = nNum/10;	}	pCurr --;	//倒置	for(int i=0;i<=(pCurr - pBg)/2;i++)	{		char cTmp = *(pBg + i);		*(pBg + i) = *(pCurr - i);		*(pCurr - i) = cTmp;	}	string str(pStr);	delete pStr;	return str;}//atoiint atoi(const char* pStr,int nLen = 0){	if(nLen == 0)	{		nLen = strlen(pStr);	}	int nValue = 0;	int nSub = 1;	int nEnd = 0;	if(pStr[0] == '-')	{		nEnd = 1;	}	for(int i=nLen-1;i>=nEnd;i--)	{		nValue += (pStr[i] - '0')*nSub;		nSub *= 10;	}	if(nEnd == 1)	{		nValue = 0- nValue;	}	return nValue;}