Advanced Coding & Software Engineering Program

introduction

unary

#include<iostream>

using namespace std;
class data
{
	public:
	int num;
	data(int n)
	{
		num=n;
	}
	
	data operator++()
	{
		num=++num;
		return num;
	}
	
	void display()
	{
		cout<<"value is "<<num;
	}
};
int main() {
 
data t1(10),result(0);
++t1;
result=++t1;

result.display();


 
  return 0;
}

binary  

#include<iostream>

using namespace std;
class data
{
	public:
	int num;
	data(int n)
	{
		num=n;
	}
	
	data operator+(data t2)
	{
		data t3(0);
		t3.num=num+t2.num;
		return t3;
	}
	
	void display()
	{
		cout<<"value is "<<num;
	}
};
int main() {
 
data t1(10),t2(20),result(0);

result=t1+t2;

result.display();


 
  return 0;
}

import React, { useState } from "react";

// store object in array 
const Form = () => {
    // state variable for input data 
    const [data, setData] = useState({
        Username: "",
        email: ""
    })
    // state variable for empty array for storing object
    const [studentData, setStudentData] = useState([]);
    const onChange = (e) => {
        setData({ ...data, [e.target.name]: e.target.value })
    }
    // object destructure
    let { Username, email } = data

    //  add in array button
    const onSubmit = (e) => {

        e.preventDefault()
        setStudentData([...studentData, { Username, email }])
        //  console.log(studentData);
        console.log(data, "input data");
        setData({ Username: "", email: "" })
    }
    // check array of object in console 
    // function checkobject(e) {

    //     e.preventDefault()
    //     console.log("object store in array data ", studentData,);
    // }
    return (
        <>
            <form  >
                {/* onSubmit={onSubmit} */}
                <h1>Student Registration</h1>
                <input type="text" value={data.Username} name="Username" onChange={onChange} placeholder="Username" />
                <br />
                <input type="text" value={data.email} name="email" onChange={onChange} placeholder="Email" />
                <br />
                <br />
                <button onClick={onSubmit} type="submit">save</button>
                {/* <button onClick={checkobject}>Check Object data in console </button> */}
            </form>
            <center>
                <h2 style={{ color: "red" }}>Student Record</h2>
                <table border={1} style={{ width: "30%", marginTop: "20px" }}>
                    <thead>
                        <tr>
                            <th>Name</th>
                            <th>Email</th>
                        </tr>

                        {
                            studentData.map((mydata, index) => {
                                return (
                                    <tr key={index}>
                                        <td>{mydata.Username}</td>
                                        <td>{mydata.email}</td>
                                    </tr>
                                )
                            })

                        }

                    </thead>
                </table>
            </center>
        </>
    )
}
export default Form