C语言实现密码本小项目

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
//定义四个数组，用来存放站点、账号、密码、备注的值
char webSite[100][20];
char userName[100][20];
char passWord[100][20];
char reMark[100][20];
//定义一个全局变量
int g_count = 0;

int main(void)
{
 InitInfo();
 int nChoice = 1;
 
 StartPassWord();
 
 while (nChoice)
 {
 printf("*********************************欢迎使用密码本*********************************\n");
 printf("        请输入以下选项进行操作：       \n");
 printf("         1、增加数据         \n");
 printf("         2、删除数据         \n");
 printf("         3、修改数据         \n");
 printf("         4、查询数据         \n");
 printf("         5、全部数据         \n");
 printf("         6、结束程序         \n");
 printf("********************************************************************************\n");
 scanf_s("%d", &nChoice);
 switch (nChoice)
 {
 case 1:
 {
 AddInfo();//增加数据 
 }break;
 case 2:
 {
 DelInfo(); //删除数据
 }break;
 case 3:
 {
 EditInfo();//修改数据
 }break;
 case 4:
 {
 FindInfo();//查询数据
 }break;
 case 5:
 {
 ReadAllInfo();//查看全部
 }break;
 case 6:
 {
 nChoice = 0;//退出程序
 }break;
 }
 }
 printf("欢迎下次使用！\n");
 
 system("pause");
 return 0;
}

//启动时输入密码
void StartPassWord();
//增加数据
void AddInfo();
//删除数据
void DelInfo();
//修改数据
void EditInfo();
//查询数据
void FindInfo();
//读取全部数据
void ReadAllInfo();
//保存数据
void SaveInfo();
//初始化数据
void InitInfo();

//增加数据
void AddInfo()
{
 printf("输入需要存储的 站点：");
 scanf_s("%s", webSite[g_count], 20);
 printf("输入需要存储的 账号：");
 scanf_s("%s", userName[g_count], 20);
 printf("输入需要存储的 密码：");
 scanf_s("%s", passWord[g_count], 20);
 printf("输入需要存储的 备注：");
 scanf_s("%s", reMark[g_count], 20);
 g_count++;
 SaveInfo();
 InitInfo();
 system("pause");
 system("cls");
}
 
//查看全部
void ReadAllInfo()
{
 FILE *pfile;
 if (fopen_s(&pfile, "data.i", "r") != 0)
 {
 printf("file open fail");
 exit(1);
 }
 
 fscanf_s(pfile, "当前个数%d\n", &g_count);
 printf("当前有%d条数据\n", g_count);
 for (int i = 0; i < g_count; i++)
 {
 printf("第%d条数据：\n", i + 1);
 printf("站点：%s,账号：%s,密码：%s,备注：%s",
 webSite[i], userName[i], passWord[i], reMark[i]);
 printf("\n");
 
 }
 fclose(pfile);
 system("pause");
 system("cls");
}
 
//保存数据
void SaveInfo()
{
 for (int j = 0; j < g_count; j++)
 {
 for (int m = 0; m < 20; m++)
 {
 webSite[j][m] ^= 5;
 userName[j][m] ^= 5;
 passWord[j][m] ^= 5;
 reMark[j][m] ^= 5;
 }
 }
 FILE *pfile;
 if (fopen_s(&pfile, "data.i", "w") != 0)
 {
 printf("file open fail");
 exit(1);
 }
 fseek(pfile, 0, SEEK_SET);
 fprintf(pfile, "当前个数%d\n", g_count);
 for (int i = 0; i < g_count; i++)
 {
 fwrite(webSite[i], 20, 1, pfile);
 fwrite(userName[i], 20, 1, pfile);
 fwrite(passWord[i], 20, 1, pfile);
 fwrite(reMark[i], 20, 1, pfile);
 fprintf(pfile, "\n");
 }
 fclose(pfile);
}
 
//删除数据
void DelInfo()
{
 char aTemp[20];
 int nFind = 0;
 int nIndex = 0;
 printf("请输入要删除的站点：\n");
 scanf_s("%s", aTemp, 20);
 for (; nIndex < g_count; nIndex++)
 {
 if (strcmp(aTemp, webSite[nIndex]) == 0)
 {
 nFind = 1;
 break;
 }
 }
 if (nFind == 1)
 {
 for (int i = nIndex; i < g_count; i++)
 {
 strcpy_s(webSite[i], 20, webSite[i + 1]);
 strcpy_s(userName[i], 20, userName[i + 1]);
 strcpy_s(passWord[i], 20, passWord[i + 1]);
 strcpy_s(reMark[i], 20, reMark[i + 1]);
 }
 g_count--;
 SaveInfo();
 InitInfo();
 printf("删除成功\n");
 }
 else
 {
 printf("查找失败！\n");
 }
 system("pause");
 system("cls");
}
 
//初始化数据
void InitInfo()
{
 FILE *pfile;
 if (fopen_s(&pfile, "data.i", "r") != 0)
 {
 printf("请先建立data.i文件！");
 system("pause");
 exit(1);
 }
 fscanf_s(pfile, "当前个数%d\n", &g_count);
 for (int i = 0; i < g_count; i++)
 {
 
 fread(webSite[i], 20, 1, pfile);
 fread(userName[i], 20, 1, pfile);
 fread(passWord[i], 20, 1, pfile);
 fread(reMark[i], 20, 1, pfile);
 fscanf_s(pfile, "\n");
 }
 for (int j = 0; j < g_count; j++)
 {
 for (int m = 0; m < 20; m++)
 {
 webSite[j][m] ^= 5;
 userName[j][m] ^= 5;
 passWord[j][m] ^= 5;
 reMark[j][m] ^= 5;
 }
 }
 fclose(pfile);
}
 
//查询数据
void FindInfo()
{
 char aTemp[20];
 int nFind = 0;
 
 printf("请输入要查询的站点：\n");
 scanf_s("%s", aTemp, 20);
 for (int nIndex = 0; nIndex < g_count; nIndex++)
 {
 if (strcmp(aTemp, webSite[nIndex]) == 0)
 {
 nFind = 1;
 }
 if (nFind == 1)
 {
 printf("站点：%s,账号：%s,密码：%s,备注：%s\n",
 webSite[nIndex], userName[nIndex], passWord[nIndex], reMark[nIndex]);
 break;
 }
 }
 if (nFind == 0)
 {
 printf("查找失败！\n");
 }
 system("pause");
 system("cls");
}
 
//修改数据
void EditInfo()
{
 char aTemp[20];
 int nFind = 0;
 
 printf("请输入要修改的站点：\n");
 scanf_s("%s", aTemp, 20);
 for (int nIndex = 0; nIndex < g_count; nIndex++)
 {
 if (strcmp(aTemp, webSite[nIndex]) == 0)
 {
 nFind = 1;
 }
 if (nFind == 1)
 {
 printf("输入需要修改的 账号：");
 scanf_s("%s", userName[nIndex], 20);
 printf("输入需要修改的 密码：");
 scanf_s("%s", passWord[nIndex], 20);
 printf("输入需要修改的 备注：");
 scanf_s("%s", reMark[nIndex], 20);
 printf("站点：%s,账号：%s,密码：%s,备注：%s\n",
 webSite[nIndex], userName[nIndex], passWord[nIndex], reMark[nIndex]);
 SaveInfo();
 break;
 }
 }
 if (nFind == 0)
 {
 printf("查找失败！\n");
 }
 system("pause");
 system("cls");
}
 
//启动时输入密码
void StartPassWord()
{
 char spw[10] = "abcd"; //程序的启动密码
 char write[10] = "";
 int nSuccess = 0;
 
 for (int i = 1; i <= 3; i++)
 {
 printf("请输入启动密码：\n");
 scanf_s("%s", write, 10);
 if (strcmp(write, spw) == 0)
 {
 nSuccess = 1;
 break;
 }
 else
 {
 printf("你的输入有误！还有%d次机会\n", 3 - i);
 system("pause");
 system("cls");
 }
 }
 if (nSuccess == 1)
 {
 printf("输入正确！按任意键开始使用程序\n");
 }
 else
 {
 printf("输入全部错误！按任意键结束程序\n");
 system("pause");
 exit(1);
 }
 system("pause");
 system("cls");
}

for (int j = 0; j < g_count; j++)
 {
 for (int m = 0; m < 20; m++)
 {
 webSite[j][m] ^= 5;
 userName[j][m] ^= 5;
 passWord[j][m] ^= 5;
 reMark[j][m] ^= 5;
 }
 }