A program to write and read records to and from a file and delete the…

readWriteRecordsToAFile.cpp

@@ -0,0 +1,113 @@
+/* A C++ program to read and write multiple student details to files,
+ read them and if required, delete the files aswell */
+
+#include<iostream> //Used for the standard I/O functions ie cin and cout
+#include<fstream> //Used for file manipulation tasks
+
+using namespace std;
+
+
+
+char filename[20]; //A string to store the name of the file globally
+
+struct student{     // A structure to store student details
+    char name[20];
+    char usn[20];
+    int age;
+};
+
+student studentInput(); // A function prototype for a function that takes student data
+void studentDisplay(struct student); // A function prototype for a functon that displays student data
+void studentWrite(struct student); // A function prototype for a function that writes data to a file
+student studentRead(struct student); // A function prototype for a function that reads data from a file
+
+int main()
+{
+    int n; // To store the number of records 
+    char ch; // To store the choice 
+    student *s;
+    s = new student[10]; // To store the records
+    cout<<"We will create a file! Give it a name:\n";
+    cin>>filename;
+    // A do while loop to control the exit of the program.
+    do{ RESTART:
+        cout<<"************************************************************\n";
+        cout<<"Choose what to do with the file "<<filename<<". \n1- Added details of a certain number of students to it.\n2- Read from the file "<<filename<<" and display the student records on it.\n3- Delete the file named "<<filename<<".\n4- Done with the everything? Exit!\n";
+        cout<<"************************************************************\n";
+        cout<<"Choice:";
+        cin>>ch;
+        cout<<"\n************************************************************\n";
+
+        switch(ch)
+        {
+            case '1':   cout<<"Enter the number of student records to be written.\n";
+                        cin>>n;
+
+                        // A loop to write n number of records
+                        for(int i=0;i<n;i++)
+                        {   
+                            s[i] = studentInput();
+                            studentWrite(s[i]);
+
+                        }
+                        break;
+            case '2':
+                        // A loop to read n number of records
+                        for(int i=0;i<n;i++)
+                        {
+                            studentRead(s[i]);
+                            studentDisplay(s[i]);
+                        }   
+                        break;
+            case '3':   remove(filename);
+                        cout<<"*****File sucessfully deleted!*****"; exit(0); // To delete the file specified
+            case '4':   exit(0); //For the exit
+
+            default: cout<<"Invalid Choice selected! Please try again."; goto RESTART;
+
+        }
+
+
+    }while(1);
+
+}
+student studentInput() // A function that takes student data
+{   
+    student s;
+    cout<<"\n************************************************************\n";
+    cout<<"Enter the student's name:\n";
+    cin>>s.name;
+    cout<<"Enter the student's USN:\n";
+    cin>>s.usn;
+    cout<<"Enter the student's age:\n";
+    cin>>s.age;
+    cout<<"\n************************************************************\n";
+
+    return s;
+}
+void studentDisplay(student s) // A function that displays student data
+{
+    cout<<"*****File Read Sucessfully*****\n\nName: "<<s.name<<"\nUSN: "<<s.usn<<"\nAge: "<<s.age<<"\n\n**************************\n";
+
+}
+void studentWrite(student s) // A function that writes data to a file
+{
+    ofstream outputFile;
+    outputFile.open(filename,ios::out|ios::app);
+    outputFile<<s.name<<"\n"<<s.usn<<" \n"<<s.age<<"\n";
+    outputFile.close();
+}
+student studentRead(student s) // A function that reads data from a file
+{
+    char ch;
+    ifstream inputFile;
+    inputFile.open(filename);
+
+
+    inputFile.get(s.name,30);
+    inputFile.get(ch);
+    inputFile.get(s.name,30);
+    inputFile.get(ch);
+    inputFile.close();
+    return s;
+}