函数代码如下：
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void run(char *str)

{
    int length = 0;
    int i;
    char *p = str;
    length = strlen(str);
   

    while(*p != '\0')
    {
        if(*p == '\n' || *p == '\r')
        {
            *p = '\0';
        }
        p++;
    }
    for (i = 0 ; i < length ; i++)
    {
        str[i] = str[i] ^ 3;
    }


}

void main()
{
    char *pathr = "C:\\Users\\Administrator\\Desktop\11\\12.txt";
    char *pathw = "C:\\Users\\Administrator\\Desktop\11\\1234.txt";
   
   
    FILE *pfr = fopen(pathr , "r");
    FILE *pfw = fopen(pathw , "w");

//    char *p;
    while(!feof(pfr))
    {
        char cache[1024] = {0};
        fgets(cache , 1023 , pfr);
        run(cache);
        fputs(cache , pfw);
        fputs("\n" , pfw);

    }

    fclose(pfr);
    fclose(pfw);
   







}