c++—简单的密码本实现

主要实现功能有增删改查数据，本地读取保存。

数据存储设计 data.h data.cpp

#pragma once
#define 添加账户      1
#define 删除账户      2
#define 修改账户      3
#define 查询账户      4
#define 查询所有      5
#define 保存本地      6
#define 退出          7

#define NUM 100
extern int g_nNum; //当前密码本容量
extern int oCho;    //判断是否保存到本地了

//定义账户结构体
typedef struct _ACCOUNT
{
    char website[];
    char userName[];
    char passWord[];
}ACCOUNT,*PACCOUNT;

#include "data.h"
int g_nNum;

函数方法的实现：

ctrl.h

#pragma once
#include "data.h"
//增加账户
void insertInfo(ACCOUNT acc[], int* nCount);
//删除账户
void deleteInfo(ACCOUNT acc[], int *nCount);
//修改账户
void alterInfo(ACCOUNT acc[], int nCount);
//查询账户
void searchInfo(ACCOUNT acc[], int nCount);
//查询所有账户
void searchALLInfo(ACCOUNT acc[], int nCount);
//保存操作
void saveInfo(ACCOUNT acc[], int nCount);
//读取数据
void readInfo(PACCOUNT *pAc, int *nCount);

ctrl.cpp

#include <stdio.h>
#include <string.h>
#include <malloc.h>
#include "data.h"
#include "ctrl.h"
void insertInfo(ACCOUNT acc[], int* nCount)
{

    int nNum = *nCount;
    if (nNum < || nNum > NUM)
    {
        printf("添加异常请重试！\n");
            return;
    }
    printf("请输入需要保存的站点：\n");
    scanf_s("%s", acc[nNum].website,);
    char ss = getchar();
    printf("请输入需要保存的用户名：\n");
    scanf_s("%s", acc[nNum].userName,);
     ss = getchar();
    printf("请输入需要保存的密码：\n");
    scanf_s("%s", acc[nNum].passWord,);
     ss = getchar();
    (*nCount)++;
    printf("保存成功！返回主菜单\n");

}

void deleteInfo(ACCOUNT acc[], int* nCount)
{
    int nNum = *nCount;
    if (nNum < || nNum > NUM)
    {
        printf("有点小毛病我也不知道咋回事你再试试！\n");
        return;
    }
    char str[] = {};
    printf("请输入你想要删除的站点：\n");
    scanf_s("%s", str, );
    for (int i = ; i < nNum; i++)
    {
        if (strcmp(str, acc[i].website) == )
        {
            for (int j=i;j<nNum-;j++)
            {
                strcpy_s(acc[j].website, , acc[j + ].website);
                strcpy_s(acc[j].userName, , acc[j + ].userName);
                strcpy_s(acc[j].passWord, , acc[j + ].passWord);
            }

            printf("删除成功！\n");
            (*nCount)--;
            return;
        }

    }
    printf("查无此站点请重试！\n");
}

void alterInfo(ACCOUNT acc[], int nCount)
{
    char str[] = {};
    printf("请输入你想要修改的站点：\n");
    scanf_s("%s", str, );
    for (int i = ; i < nCount; i++)
    {
        if (strcmp(str, acc[i].website) == )
        {

            printf("请输入修改后的站点：\n");
            scanf_s("%s", acc[i].website, );
            printf("请输入修改后的用户名：\n");
            scanf_s("%s", acc[i].userName, );
            printf("请输入修改后的密码：\n");
            scanf_s("%s", acc[i].passWord, );
            printf("修改成功！\n");
            return;
        }

    }
    printf("查无此站点请重试！\n");
}

void searchInfo(ACCOUNT acc[], int nCount)
{
    char str[] = {};
    printf("请输入你想要查询的站点：\n");
    scanf_s("%s", str, );
    for (int i = ;i<nCount;i++)
    {
        if (strcmp(str,acc[i].website) ==)
        {
            printf("查询结果为：\n");
            printf("站  点：%s  \n", acc[i].website);
            printf("用户名：%s  \n", acc[i].userName);
            printf("密  码：%s  \n", acc[i].passWord);
            return;
        }
    }
    printf("暂无搜索结果\n");

}

void searchALLInfo(ACCOUNT acc[], int nCount)
{

    printf("-------------查询结果----------------\n");
    if (==nCount)
    {
        printf("空\n");
        return;
    }

    for (int i = ; i< nCount; i++)
    {
        printf("站  点：%s  \n",acc[i].website);
        printf("用户名：%s  \n",acc[i].userName);
        printf("密  码：%s  \n",acc[i].passWord);
        printf("--------------------------------\n");
    }
}

void saveInfo(ACCOUNT acc[], int nCount)
{
    FILE* pFile=NULL;
    errno_t err = fopen_s(&pFile, "file.txt", "wb");
    if (err != )
    {
        printf("保存本地失败！\n");
        return ;

    }
    g_nNum = nCount;
    fwrite(&nCount, sizeof(nCount), , pFile);
    fwrite(&g_nNum, sizeof(g_nNum), , pFile);
    int bytsize = sizeof(ACCOUNT) * g_nNum;
    char* buf = (char*)malloc(bytsize);
    memcpy_s(buf, bytsize, acc, bytsize);
    for (int i = ; i < bytsize; i++)
    {
        buf[i] += ;
    }
    fwrite(buf, sizeof(ACCOUNT), g_nNum, pFile);
    fclose(pFile);
    free(buf);
    buf = NULL;
    printf("已成功保存到本地！\n");
}
void readInfo(PACCOUNT *pAc, int *nCount)
{

    FILE* pFile=NULL;
    errno_t err = fopen_s(&pFile, "file.txt", "rb");
    if (err != )
    {
        *pAc = (PACCOUNT)malloc(sizeof(ACCOUNT) * NUM);
        g_nNum = NUM;
        return ;
    }
    fread(nCount, sizeof(nCount), , pFile);
    fread(&g_nNum, sizeof(g_nNum), , pFile);
    if (g_nNum==)
    {
        *pAc= (PACCOUNT)malloc(sizeof(ACCOUNT));
        fclose(pFile);
        return;
    }
    *pAc = (PACCOUNT)malloc(sizeof(ACCOUNT) * g_nNum);
    memset(*pAc, , sizeof(ACCOUNT) * g_nNum);
    size_t lent = fread(*pAc, sizeof(ACCOUNT), g_nNum, pFile);
    if (lent!=g_nNum)
    {
        printf("读取错误！");
        fclose(pFile);
        return;
    }
    int bytsize = sizeof(ACCOUNT) * g_nNum;
    char* buf = (char*) *pAc;
    for (int i = ; i < bytsize; i++)
    {
        buf[i] -= ;
    }

    fclose(pFile);

}

主界面 menuMain.cpp

#include <stdio.h>
#include <malloc.h>
#include "data.h"
#include "ctrl.h"
#include <stdlib.h>
int main()
{
    int g_nNum = ; //当前密码容量
    int nCount = ; //当前密码个数
    PACCOUNT pAc = nullptr;
    readInfo(&pAc, &nCount);
    //pAc = (PACCOUNT)malloc(sizeof(ACCOUNT) * NUM);
    int nOver = ;
    int oper;
    int oCho = ;
    printf("欢迎使用尘风密码本\n");
    while (nOver)
    {
        printf("======主菜单===========\n");
        printf("1 添加账户\n");
        printf("2 删除账户\n");
        printf("3 修改账户\n");
        printf("4 查询账户\n");
        printf("5 查询所有账户\n");
        printf("6 保存本地\n");
        printf("7 退出\n");
        printf("请输入你想要进行的操作序号：\n");
        scanf_s("%d",&oper);

        switch (oper)
        {
        case 添加账户:
        {
            insertInfo(pAc, &nCount);
            oCho += ;
        }
            break;
        case 删除账户:
        {
            deleteInfo(pAc, &nCount);
            oCho += ;
        }
            break;
        case 修改账户:
        {
             alterInfo(pAc,nCount);
             oCho += ;

        }
            break;
        case 查询账户:
        {
            searchInfo(pAc, nCount);

        }
                break;
        case 查询所有:
        {
            searchALLInfo(pAc, nCount);
        }
                break;
        case 保存本地:
        {
            saveInfo(pAc, nCount);
            oCho = ;
        }
                break;
        case 退出:
        {
            if (oCho!=)
            {
                printf("更改是否保存到本地？（y or 其他)\n");
                char x = getchar();
                char s;
                scanf_s("%c", &s,);
                if ('y'== s)
                {
                    saveInfo(pAc, nCount);
                }

            }
            printf("谢谢您的使用！");
            nOver = ;
            system("pause");
            system("cls");

        }
                break;
        default:
        {
            printf("请输入正确命令");
        }
            break;
        }

    }
    free(pAc);
    pAc = nullptr;

}