好的，我花了最后8个小时，阅读书籍和无数线程，但无法找到/理解解决方案。 我需要创建一个有2个班级的大学图书馆。会员和书。所有的花花公子，我都成功了。我进行了设置，以便您输入名字，姓氏和班级组（很快就会有一个年龄，当我开始工作时）。一旦全部进入系统，系统会将其读回给您，然后您输入另一个成员或返回/退出应用程序。现在差不多凌晨1点，我很感激如何将用户条目写入.txt文件 我有它去.txt文件，但它是垃圾（即：PÿPÿcmd.d{/‡P |ÿPÿcmd.exe PP.exe）
任何有关解释的帮助都将是一个巨大的帮助！
// include files - library
#include "stdio.h"
#include "malloc.h"
#include "stdlib.h"
#include "string.h"
#include "conio.h"
#include <string.h>
#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <math.h>
using namespace std;
// Declare variables
int iCounter = 0; // Starting at 0
char sBlank[2]= " "; // Puts a blank space
char iOpt; // Options for the main menu
char start(); // function to load the menu
char write(); // Append the database
char read(); // Display the content from the database.txt file
char create(); // Creates a new database (overwrites database.txt)
int close(); // For exiting the program
struct NODE {
char sFirstName[8]; // Allows a first name upto 8 characters
char sLastName[12]; // Allows a last name upto 12 characters
char iBirth[3]; // Age value
char sClass[6];
}; // End of structure
struct NODE *pRecord; // Pointer notation
char sLine[49+1]; // 1-D table
char sTable[49+1][49+1]; // 2-D table
class STUDENT
{
private: // Private Data Member
string sFirst;
string sLast;
string sGroup;
int iBirth;
public: // Public Member Functions
STUDENT(); // constructor and destructor fns.
~STUDENT() { } // could and often would include code in the destructor
char iSrnClr(void);
char iStudentStart(void);
char sStudentGet(void);
char iMarkReport(void);
}; // basic class outline - member function definitions follow
STUDENT::STUDENT()
{
// To Do list
string sFirst = "Default";
string sLast = "Name";
string sGroup = "ITN6";
int iBirth = 18;
} // Constructor - Initilises data
// Clear Screen member function
char STUDENT::iSrnClr()
{
// To Do list - these functions are non-standard [TurboC], replace them with shell commands...
system("COLOR 79");
system("CLS");
puts("\n \t \t College Library System\n");
return(0);
} // end of iScrClr() STUDENT class member function
// Initilize Student Title Page
char STUDENT::iStudentStart()
{
// To Do List
cout << "\n \t\t STUDENT PAGE \n\n"<< endl;
return(0);
} // end of iStudentStart STUDENT class member function
char STUDENT::sStudentGet() //iMarkGet() member function of STUDENT CLASS
{
// To Do List
char sFirstName[12]; //Initlize input buffer
char sLastName[12]; //Initlize input buffer
char sClass[6];
// Initialise memory space
pRecord = (struct NODE *) malloc(sizeof(struct NODE));
FILE * fDatabase; // Write to file
// Setting up the screen
system("color 79");
system("cls");
fDatabase = fopen ("students.txt","w"); // Writes to the file 'Database.txt'
for (iCounter = 0; iCounter < 1; iCounter++)
{
cout << "\n\tPlease enter the first name" << endl;
cin >> sFirstName;
sFirst = sFirstName;
cout << "\n\tPlease enter the Last Name" << endl;
cin >> sLastName;
sLast = sLastName;
cout << "\n\tPlease enter the group" << endl;
cin >> sClass;
sGroup = sClass;
strcat(sLine,pRecord->sFirstName); // Prints clients First name
strcat(sLine,pRecord->sLastName); // Prints clients Last name
strcat(sLine,pRecord->sClass); // Prints clients Age
fprintf(fDatabase, "\n \t %s \n", sLine); // Prints each string and creates in 'database.txt' file also
strcpy(sTable[iCounter],sLine);
strcpy(sLine,sBlank);
} // end loop
fclose(fDatabase); // Close the 'database.txt' file to stop writing
} // end of iMarkGet() member function of STUDENT class
char STUDENT::iMarkReport()
{
cout << "Students First Name is: " << sFirst << endl;
cout << "Their Last Name is: " << sLast << endl;
cout << "They are in class group: "<< sGroup <<endl;
return(0);
}
int main(void)
{
// Setting up the screen
system("color 79"); // Grey background, blue font
const char password[15] = "login"; // const will not allow the password to change. The password is "login"
char pass[15]; //the users enters a password, upto 15 characters
char h; // h is a placeholder
int position = 0; // position is the position of the password (i.e. how many characters where entered)
printf("\t Patrick Lowe - Mobile Phone Network Client List - ITN5 - January \n \n");
printf("%s", " \t \t Password: ");
do { // function to gather user input while also hidding printed characters with an *
h = getch();
if( isprint(h) ) // isprint makes sure the character can be printed
{
pass[ position++ ] = h;
printf("%c", '*'); // everytime a character is entered it is replaced or 'hidden' behind and asterisk
}
else if( h == 8 && position ) // everytime a character is deleted, it removes the entry and also the asterisk
{
pass[ position-- ] = '\0';
printf("%s", "\b \b");
}
} while( h != 13 );
if(strcmp(pass, password) != 0) // this will compare the correct password and the one entered, if incorrect do the following
{
printf("\n \n Invalid password!\n \n Abort! \n \n");
}
else // otherwise, if correct do this
{
printf("\n \n Access Granted! \n \n");
getch(); // press enter to continue
system("cls"); // clear the screen
start(); // load the start function (begin the database management)
}
getchar(); // if the password is invalid, press a key to continue
return 0; // For safe exit
}
char start(void)
{
do
{
// Prompt for and capture the data
printf("\t Patrick Lowe - College Library Manager - ITN6 - January");
printf("\n \n Please Select an option: \n");
printf("\t 1. Create a new Member \n");
printf("\t 2. Add a new client \n");
printf("\t 3. View current clients \n");
printf("\t 4. Exit \n");
printf("\n Database Function: \t ");
scanf("\n %c", &iOpt); // Captures users option
switch(iOpt)
{
// Process the data
case '1': // Creating a new client list
create(); // Load function to create a new client list
break;
case '2': // Adding a new client
write(); // load function to append current client list
break;
case '3': // Read or view current client list
read(); // Load function to view the client list
break;
case '4': // Exit the program
close(); // Load function to exit program
break;
default:
printf("\n \t Invalid Entry!");
} // End of Option Switch
getch();
// Generate options menu
printf("\n \n Do you wish to continue(Y/N):\t ");
scanf("\n %c", &iOpt);
system("cls");
printf("Thank you for using my database \n \n \t Patrick Lowe \n \n Press any key to Continue");
getch();
system("cls");
} // End of Do
while(iOpt == 'y');
} // End of Main
char write() // Append a database file
{ } // ENd of Write
char create() // Creates a new database (Overwrites the database.txt file)
{
// declare variables
STUDENT PAT; // object instance of STUDENT class
char cReply = 'y' ;
while ( cReply == 'y' || cReply == 'Y' ) // into the loop if true
{
PAT.iSrnClr(); // Clear Screen
PAT.iStudentStart(); // Initialize Page
PAT.sStudentGet(); // Capture Data
PAT.iSrnClr(); // Clear Screen
PAT.iMarkReport(); // Output Multiplication Table
// exit routine - Prompt User for another input
cout << "Do you want another Input? (y or n)" ;
cin >> cReply ;
} // end while
exit(0);
} // End of Create
char read() // Reads a database file
{
FILE *fDatabase; // Write to file
char buf[260]; // Prints upto 260 characters
fDatabase = fopen ("database.txt", "r"); // Opens the database.txt file to be read
if(!fDatabase)
return 0;
while (fgets(buf,260, fDatabase)!=NULL)
printf("\n \t %s",buf); // Prints the database file with a limit of 260 characters
printf("\n Press Any Key To Continue \n");
fclose(fDatabase); // Closes the database.txt file
return 0;
} // End of Read
int close() // for exiting the program
{
printf("\n \t Thank you! \n");
exit(0); //closes the program
}