Solidity TypeError Data location must be memory for parameter in function but none was given

Question

My function:

function add_voter(address add_of_voter, string name_of_voter)public {

require (msg.sender == admin, "Action prohibited! Adding voter can only be done by Admin");

                voters[voter].voter_add = add_of_voter;

                voters[voter].voter_name = name_of_voter;

}

When I run the code, I get this error:

TypeError: Data location must be "memory" for parameter in function, but none was given. 

How to solve it?

Answer 1

When you are using a string argument, you have to mention where you want store the data. So, try this:

function add_voter(address add_of_voter, string memory name_of_voter)public {

require (msg.sender == admin, "Action prohibited! Adding voter can only be done by Admin");         

                voters[voter].voter_add = add_of_voter;

                voters[voter].voter_name = name_of_voter;

}

Answer 2

You can to explicitly mention that the string is a memory. Change the first line of your code to this:

function add_voter(address add_of_voter, string memory name_of_voter)public {

Answer 3

Could be a version problem. This worked for me on version 0.4.10. Try it.

Comments

Facing same problem with this version also.

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Are you running it on Remix IDE or on your system?

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Tried both. Doesn't work. I tried the solution in another answer and one of it worked.