yihuo2.cpp

简单的异或加密

#include<stdio.h>

void main(int argc, char* argv[])
{
	FILE* fi, *fo;
	char* cp;
	int c;

	fi = fopen("2.txt", "rb");
	fo = fopen("3.txt", "wb");
	cp = "123";

	if(*cp!='\0')
	{
		if(fi!=NULL)
		{
			if(fo!=NULL)
			{
				while((c=getc(fi))!=EOF)
				{
					if(!*cp)
						cp = "123";
					c^= *(cp++);
					putc(c, fo);
				}
				fclose(fo);
			}
			fclose(fi);
		}
	}
}