简单的文件加密

#define  _CRT_SECURE_NO_WARNINGS//关闭安全检查
#include
#include

char jia(char ch)
{
	return ch + 1;//可以使用位加密return ch^523;
}
char jie(char ch)
{
	return ch - 1;//可以使用位解密return ch^523;

}

void jiami(char *path, char *pathjia)
{
	FILE *pfr, *pfw;
	pfr = fopen(path, "r");//读取
	pfw = fopen(pathjia, "w");//写入
	if (pfr == NULL || pfw == NULL)
	{
		printf("失败");
	}
	else
	{
		while (!feof(pfr))//feof,文件结束返回1，否则返回0，前面加上!效果相反
		{
			char ch = fgetc(pfr);//读取字符
			putchar(ch);
			fputc(jia(ch), pfw);//写入加密字符
		}
		fclose(pfr);
		fclose(pfw);
	}
}
void jiemi(char *path, char *pathjie)
{
	FILE *pfw, *pfr;
	pfw = fopen(path, "r");
	pfr = fopen(pathjie, "w");
	if (pfr == NULL || pfw == NULL)
	{
		printf("解密失败");
	}
	else
	{
		while (!feof(pfw))
		{
			char ch = fgetc(pfw);
			putchar(ch);
			fputc(jie(ch), pfr);
		}
		fclose(pfw);
		fclose(pfr);
	}
}


void main()
{
	char *path = "C:\\Users\\snail\\Desktop\\1.txt";

	char *pathjia = "C:\\Users\\wh\\Desktop\\jiami.txt";
	char *pathjie = "C:\\Users\\wh\\Desktop\\jiemi.txt";

	jiami(path, pathjia);

	jiemi(pathjia, pathjie);

	system("pause");
}