#include <iostream.h>
#include <fstream.h>
int main()
{
	ofstream in;
	in.open("num",ios::binary);			//以二进制形式打开文件
	char c[]={'a','b','c','d','e'};		//定义字符数组
	char *p=c;
	in.write(p,5);						//写入文件
	return 0
}