文本数据加密及查询

文本数据加密

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>

void run(char *str)
{
    char *p = str;
    while (*p != '')
    {
        if (*p == '
' || *p == '
')
        {
            *p = '';
        }
        p++;
    }
    int length = strlen(str);
    for (int i = 0; i < length; i++)
    { 
        str[i] ^= 3; 
    }


}

void main()
{
    FILE *pfr = fopen("E:\XXXX.txt", "r");
    FILE *pfw = fopen("E:\XX.txt", "w");
    while (!feof(pfr))
    {
        char str[1024] = { 0 };
        fgets(str, 1023, pfr);
        run(str);
        fputs(str, pfw);
        fputs("
", pfw);
    }



    fclose(pfr);
    fclose(pfw);

    system("pause");
}

查询 加密后的数据

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void run(char *str)
{    // 处理文本文件"
"
    char *p = str;
    while (*p != '')
    {
        if (*p == '
' || *p == '
')
        {
            *p = '';
        }
        p++;
    }
    int length = strlen(str);
    for (int i = 0; i < length; i++)
    {
        str[i] ^= 3;
    }


}

void main()
{
    FILE *pfr = fopen("E:\XX.txt", "r"); //加密后的文本
     
    while (!feof(pfr))
    {
        char str[1024] = { 0 };
        fgets(str, 1023, pfr);
        run(str);
        char *p = strstr(str, "XXX，");
        char *p1 = strstr(str, "XXX");

        if (p != NULL && p1 != NULL)
        {
            printf("%s
", p);
        }
    }



    fclose(pfr);


    system("pause");
}