/*
 * 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);