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  int i = 10;
  char szBuf[10] = "";
  itoa(i, szBuf, 10);
  cout<<"itoa: szBuf = "<<szBuf<<endl;
  i = 0;
  i = atoi(szBuf);
  cout<<"atoi: i = "<<i<<endl;
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sprintfÊÇÓÃÀ´¸ñʽ»¯×Ö·û´®µÄÒ»¸öCº¯Êý£¬sscanfÔòÊÇ´Ó×Ö·û´®ÖжÁȡֵµÄÒ»¸öCº¯Êý¡£ÓÉÓÚHerb Sutter£¨Exceptional C++ϵÁÐÖø×÷µÄ×÷Õߣ©½Ìµ¼ÎÒÃÇ“ÓÀÔ¶Ò²²»ÒªÊ¹ÓÃsprintf”£¬ËùÒÔÕâÀïÎÒÃÇֻʹÓÃsnprintf¡£ÓÉÓÚsnprintf½øÈëC±ê×¼½ÏÍí£¬ËùÒÔÔÚÄãµÄ±àÒëÆ÷ÖÐÒ²ÐíÖ»ÄÜʹÓ÷DZê×¼µÄ_snprintf£¨ÀýÈçÎÒµÄVC6ƽ̨£©¡£Ô´´úÂëÈçÏ£º
  int i = 20;
  char szBuf[10] = "";
  memset(szBuf, 0, sizeof(szBuf));
  _snprintf(szBuf, sizeof(szBuf), "%d", i);
  cout<<"_snprintf: szBuf = "<<szBuf<<endl;
  i = 0;
  sscanf(szBuf,"%d",&i);
  cout<<"sscanf: i = "<<i<<endl;
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  #include <sstream>
using namespace std;
int i = 30;
string strRel;
  ostringstream oss;
  oss<<i;
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