letter

using UnityEngine;

using System.Collections;

public class ExLetter1 : MonoBehaviour {

// Use this for initialization

void Start () {

string t1 = "KOREA WORLD";

int pos = FindChar("KOREA WORLD", 'A');

print (t1 + " " + pos);

string t2 = ReplaceChar(t1, 'O', 'Q');

print(t2);

pos =  FindString(t1, "EA");

print (pos);

}

// Update is called once per frame

void Update () {

}

int FindChar(string t, char c){

for(int i = 0; i < t.Length; i++){

if(t[i] == c){

return i;

}

}

return -1;

}

string ReplaceChar(string t, char c1, char c2){

string text = " ";

for(int i=0; i < t.Length; i++){

if(t[i] == c1){

text += c2;

}else{

text += t[i];

}

}

return text;

}

int FindString(string t, string s){

bool isOk = false;

for(int i = 0; i < t.Length; i++){

isOk = true;

for(int j = 0; j < s.Length; j++){

if ( t[i + j] != s[j] ){

isOk = false;

break;

}

}

if(isOk == true){

return i;

}

}

return -1;

}

}