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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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  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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int i = 30;
string strRel;
  ostringstream oss;
  oss<<i;
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{
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 {
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