i have declared a string variable in struct like

struct test{   
     string  testString;

I have written a function to access the variable like

 function getteststring(uint256 index)public returns (string memory)
              return test[index].testString;            

when i try to call this function using web3.js i get "0xc05205ee00000000000000000000000000000000000000000000000000000000000000c80000000000000000000000000000000000000000000000000000000000000001" , converting this to UTF8 fails Error: Invalid continuation byte

can anyone guide me on how to access this var and convert in readable format


test is a struct not an array. You simply can't write something like test[index].

If you want make an array of struct below code might help.

pragma solidity ^0.5.4;

contract A{
    struct test{
        string  testString;
    test[] tests;

    constructor() public {

    function getteststring(uint256 index)public view returns (string memory){
        return tests[index].testString;        
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