string 삭제 & 삽입

using UnityEngine;

using System.Collections;

public class ExPars : MonoBehaviour {

// Use this for initialization

void Start () {

string s = "HELLO WORLD";

string re = SubString(s, 6, 3, 'Q');

print (re);

}

string SubString(string s, int pos, int count, char ch) {

string result = "";

for(int i = 0; i < pos; i++){

result += s[i];

}

for(int i = pos; i < pos + count; i++){

result += ch;

}

for(int i = pos+count; i < s.Length; i++){

result += s[i];

}

return result;

}

// Update is called once per frame

void Update () {

}

}