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edited Apr 24, 2019 at 7:46

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pragma solidity ^0.5.0;

contract student { string private name; string private birthdate; string private department; string private location; string private email; uint256 private id; uint256 private mobile_no; uint256 counter=0;

pragma solidity ^0.5.0;

contract student
 {
    string private name;
    string private birthdate;
    string private department;
    string private location;
    string private email;
    uint256 private id;
    uint256 private mobile_no;
    uint256 counter=0;
    
    function setName(string memory myname) public 
    {
        name=myname;
    }
    function getName() public view returns(string memory )
    {
        return name;
    }
    
     constructor ()public
    {
        id=counter+1;
        counter=counter+1;
    }
    function getid() public view returns(uint256 id1)
    {
        id1=id;
        return id1;
    }
    
    function setbirthdate(string memory _birthdate) public 
    {
        birthdate = _birthdate;
    }

    function getbirthdate() public view returns(string memory )
    {
        return birthdate;
    }
    
    function setdepartment(string memory mydepartment) public
    {
        department = mydepartment;   
    }
    function getdepartment() public view returns(string memory )
    {
        return department;
    }
    function setlocation(string memory mylocation) public
    {
        location= mylocation;   
    }
    function getlocation() public view returns(string memory )
    {
        return location;
    }
    
    function setmobileno(uint256 myphonenumber) public
    {
        mobile_no = myphonenumber;
    }
    function getmobileno() public view  returns(uint256 )
    {
        return mobile_no;
    } 


 }

}

pragma solidity ^0.5.0;

function setName(string memory myname) public 
{
    name=myname;
}
function getName() public view returns(string memory )
{
    return name;
}

 constructor ()public
{
    id=counter+1;
    counter=counter+1;
}
function getid() public view returns(uint256 id1)
{
    id1=id;
    return id1;
}

function setbirthdate(string memory _birthdate) public 
{
    birthdate = _birthdate;
}

function getbirthdate() public view returns(string memory )
{
    return birthdate;
}

function setdepartment(string memory mydepartment) public
{
    department = mydepartment;   
}
function getdepartment() public view returns(string memory )
{
    return department;
}
function setlocation(string memory mylocation) public
{
    location= mylocation;   
}
function getlocation() public view returns(string memory )
{
    return location;
}

function setmobileno(uint256 myphonenumber) public
{
    mobile_no = myphonenumber;
}
function getmobileno() public view  returns(uint256 )
{
    return mobile_no;
}

}

pragma solidity ^0.5.0;

contract student
 {
    string private name;
    string private birthdate;
    string private department;
    string private location;
    string private email;
    uint256 private id;
    uint256 private mobile_no;
    uint256 counter=0;
    
    function setName(string memory myname) public 
    {
        name=myname;
    }
    function getName() public view returns(string memory )
    {
        return name;
    }
    
     constructor ()public
    {
        id=counter+1;
        counter=counter+1;
    }
    function getid() public view returns(uint256 id1)
    {
        id1=id;
        return id1;
    }
    
    function setbirthdate(string memory _birthdate) public 
    {
        birthdate = _birthdate;
    }

    function getbirthdate() public view returns(string memory )
    {
        return birthdate;
    }
    
    function setdepartment(string memory mydepartment) public
    {
        department = mydepartment;   
    }
    function getdepartment() public view returns(string memory )
    {
        return department;
    }
    function setlocation(string memory mylocation) public
    {
        location= mylocation;   
    }
    function getlocation() public view returns(string memory )
    {
        return location;
    }
    
    function setmobileno(uint256 myphonenumber) public
    {
        mobile_no = myphonenumber;
    }
    function getmobileno() public view  returns(uint256 )
    {
        return mobile_no;
    } 


 }

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asked Apr 24, 2019 at 7:37

Partha Pratim Sarkar Choito

How can I create an array of objects of a specific smart contract in solidity?

I am developing a university management system using ethereum. So,for that I need an entity "Student" and I have created a smart contract with some basic functionalities. Here is my code snippet for student.sol

pragma solidity ^0.5.0;

function setName(string memory myname) public 
{
    name=myname;
}
function getName() public view returns(string memory )
{
    return name;
}

 constructor ()public
{
    id=counter+1;
    counter=counter+1;
}
function getid() public view returns(uint256 id1)
{
    id1=id;
    return id1;
}

function setbirthdate(string memory _birthdate) public 
{
    birthdate = _birthdate;
}

function getbirthdate() public view returns(string memory )
{
    return birthdate;
}

function setdepartment(string memory mydepartment) public
{
    department = mydepartment;   
}
function getdepartment() public view returns(string memory )
{
    return department;
}
function setlocation(string memory mylocation) public
{
    location= mylocation;   
}
function getlocation() public view returns(string memory )
{
    return location;
}

function setmobileno(uint256 myphonenumber) public
{
    mobile_no = myphonenumber;
}
function getmobileno() public view  returns(uint256 )
{
    return mobile_no;
}

}

I have used web3.js to interact between the smart contract and web page. Now I want to create an array of student object and use them whenever I need to create a student. How can I do it? Please help me