Problem with passing an argument for a Structure

Question

I am trying to compile the following program. I have declared a structure and I am passing a variable of it in a function in order to assign it to an array of structure.

pragma solidity ^0.5.1; 
contract investorPayment{
   struct st_investors{
      uint invested;
      uint payout;
      address payable Address;
   }
   st_investors[100] investors;
   

   function pay(uint min_investment, address payable addr, st_investors memory newInvestor) public{
      uint payout;
      for (uint i=0; i < investors.length; i++) {
         investors[i].Address = addr;
         if (investors[i].invested == min_investment) {
            payout = investors[i].payout;
            if (!(investors[i].Address.send(payout)))
               revert();
            investors[i] = newInvestor;
         }
      }
   }
}     

I am getting the following error message:'

solc failedsend.sol failedsend.sol:11:60: Error: This type is only supported in the new experimental ABI encoder. Use "pragma experimental ABIEncoderV2;" to enable the feature. function pay(uint min_investment, address payable addr, st_investors memory newInvestor) public
^-----------------------------^

Somebody please guide me.

Zulfi.

Answer 1

You have two alternatives:

=> Until pragma version ^0.7, you should add the following line:

pragma solidity ^0.5.1;
pragma experimental ABIEncoderV2;  // Add line

=> Upgrade contract to version ^0.8:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;