/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
declare function print(arg:any, arg1?:any):string;

let str:string = '1234567890上下左右中';

// two const
print('123' == '123');
print(str == '1234567890上下左右中');
print('1' == '1')
print(str[0] == '12')

// one const
let ans = 0;
for (let i = 0; i<15; ++i) {
  let m:string = str[i];
  if (m == '1' || m == '上' || m == '国') {
    ans += 1;
  }
}
print(ans);

// no const
function foo(flag) {
  let str = '12';
  if (flag) {
    return str[0];
  } else {
    return str[1];
  }
}
let left:string = foo(true);
let right1:string = foo(true);
let right2:string = foo(false);
print(left == right1);
print(left == right2);