Sample file processing
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The document outlines the steps to create a C++ program that processes student records stored in a text file. It includes: 1) Declaring necessary header files and functions like viewRecords() and insertRecords(). 2) A main() function with a menu to call the view and insert functions. 3) Function prototypes and definitions for outputting records and inserting new records by prompting the user for input and writing to a file. 4) A viewRecords() function that opens the file, prints headers, and calls the output function to display each record.
![Step 3(Specify your main content)
int main()
{
int ch;
cout<<"File Processing :: Input - Output"<<endl;
cout<<"[1] - View Recordsn";
cout<<"[2] - Insert Records";
givechoice:
cout<<"nchoice: ";
cin>>ch;
switch(ch)
{
case 1: cout<<"nView Recordsn";
viewRecords();
break;
case 2: cout<<"nInsert Recordsn";
insertRecords();
break;
default: cout<<"Invalid"; goto givechoice;
}
}](https://image.slidesharecdn.com/samplefileprocessing-120511102718-phpapp02/85/Sample-file-processing-3-320.jpg)
Sample file processing
- 1. Step 1(List down all header file) #include "stdafx.h" #include<iostream> #include<fstream> #include<iomanip> #include<string> #include<cstdlib> using namespace std;
- 2. Step 2(Identify all possible functions) void viewRecords();//function to view records void insertRecords();//function to insert records void outputline(int, const string, const string); // prototype of method to output
- 3. Step 3(Specify your main content) int main() { int ch; cout<<"File Processing :: Input - Output"<<endl; cout<<"[1] - View Recordsn"; cout<<"[2] - Insert Records"; givechoice: cout<<"nchoice: "; cin>>ch; switch(ch) { case 1: cout<<"nView Recordsn"; viewRecords(); break; case 2: cout<<"nInsert Recordsn"; insertRecords(); break; default: cout<<"Invalid"; goto givechoice; } }
- 4. Srep 4 (Outline of the output) //this will iterate until there's data to read void outputline(int studentid, const string name, const string course) { cout<<left<<setw(15)<<studentid<<left<< setw(17)<<name<<left<<setw(10)<<cou rse<<endl; }
- 5. Step 5(Output Process) /*-------------------insert records------------------------------------*/ void insertRecords() { //open the file for input ofstream outFile; outFile.open("Student.txt", ios::app); //check if the file exists if (!outFile) { cerr<< "File could not be opened."; exit (1); } //prompt the user to enter data cout<<"Enter the 10-digit student number, name and program code."<<endl; cout<<"Enter end of file to end input."<<endl<<"?"; int studentid; string name, course; //user will enter data while(cin>>studentid>>name>>course) { outFile << studentid <<" "<< name <<" "<< course<<endl; cout<<"?"; } }
- 6. Step 6(View Record you input) //function to view records void viewRecords() { ifstream inFile; inFile.open("Student.txt"); //open file for output int studentid; string name, course; //print header cout<<left<<setw(15)<<"Student ID"<<setw(17)<<"Student Name"<<setw(10)<<"Prog Code"<<endl; //output the content of the file by calling the function while(inFile>>studentid>>name>>course) outputline(studentid, name, course); }