另类思路：VC判断某字符串是否为纯数字？

#include <afx.h>
#include <windows.h>
#pragma comment(lib,"user32.lib")
/*
判断某字符串中是否为纯数字0-9
成功返回TRUE，否则返回FALSE
*/
BOOL IsNum(char * szTemp)
{
int nTemp = atoi(szTemp);

if(0 == nTemp)
return FALSE;
return TRUE;
}
/*
WinMain入口函数
*/
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR pszCmdLine, int cmdShow)
{
char    szTest1[64] = "h123ello";
char    szTest2[64] = "123";
CString strTemp;

BOOL bRet1 = IsNum(szTest1);
BOOL bRet2 = IsNum(szTest2);

strTemp.Format("ret1=%d,ret2=%d",bRet1,bRet2);
MessageBox(NULL,strTemp,NULL,NULL);
return 0;
}