整数的读和写 CFile

用缓冲区转换：
char buf[100];
int a=10;

CFile fout;
CFile fin;

fout.Open("1.txt",CFile::modeCreate | CFile::modeWrite);
sprintf(buf,"%d",a);
fout.Write(buf,sizeof(buf));
fout.Close();

fin.Open("1.txt",CFile::modeRead);
fin.Read(buf,sizeof(buf));
sscanf(buf,"%d",&a);
fin.Close();
或者用标准的输入输出方式:
#include <fstrream>
using namespace std;