Simple Program for Read & Write File Operation (Convert lowercase...

program to convert lowercase to uppercase.

Simple Program for Reading & Write File Operation (Convert lowercase to uppercase) Algorithm/Steps:

• STEP 1: Start the program.
• STEP 2: Declare the variables.
• STEP 3: Read the file name.
• STEP 4: open the file to write the contents.
• STEP 5: writing the file contents up to reach a particular condition.
• STEP6: write the file contents as uppercase.
• STEP7: open the file to read the contents.
• STEP 8: Stop the program.

Read & Write File Operation (Convert lowercase to uppercase) Program

#include<fstream.h>
#include<stdio.h>
#include<ctype.h>
#include<string.h>
#include<iostream.h>
#include<conio.h>

void main() {
    char c, u;
    char fname[10];
    clrscr();
    ofstream out;
    cout << "Enter File Name:";
    cin>>fname;
    out.open(fname);
    cout << "Enter the text(Enter # at end)\n"; //write contents to file
    while ((c = getchar()) != '#') {
        u = c - 32;
        out << u;
    }
    out.close();
    ifstream in(fname); //read the contents of file
    cout << "\n\n\t\tThe File contains\n\n";
    while (in.eof() == 0) {
        in.get(c);
        cout << c;
    }
    getch();
}

Sample Output

Enter File Name: two.txt
Enter contents to store in file (enter # at end)
oops programming
The File Contains
OOPS PROGRAMMING

How It Works

This C++ program demonstrates Simple Program for Read & Write File Operation (Convert lowercase… It first reads the required values as input, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Iterate over the data using a loop to apply the logic.
4. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Learn the concept first, then study the code:

• C++ Programs — Browse all C++ Programs.