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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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#include <sstream>
using namespace std;
int i = 30;
string strRel;
ostringstream oss;
oss<<i;
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