13af6ab5fSopenharmony_ci/* 23af6ab5fSopenharmony_ci * Copyright (c) 2023 Huawei Device Co., Ltd. 33af6ab5fSopenharmony_ci * Licensed under the Apache License, Version 2.0 (the "License"); 43af6ab5fSopenharmony_ci * you may not use this file except in compliance with the License. 53af6ab5fSopenharmony_ci * You may obtain a copy of the License at 63af6ab5fSopenharmony_ci * 73af6ab5fSopenharmony_ci * http://www.apache.org/licenses/LICENSE-2.0 83af6ab5fSopenharmony_ci * 93af6ab5fSopenharmony_ci * Unless required by applicable law or agreed to in writing, software 103af6ab5fSopenharmony_ci * distributed under the License is distributed on an "AS IS" BASIS, 113af6ab5fSopenharmony_ci * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 123af6ab5fSopenharmony_ci * See the License for the specific language governing permissions and 133af6ab5fSopenharmony_ci * limitations under the License. 143af6ab5fSopenharmony_ci */ 153af6ab5fSopenharmony_ci 163af6ab5fSopenharmony_ci/** 173af6ab5fSopenharmony_ci * A generic stack class. 183af6ab5fSopenharmony_ci * @template T - The type of elements in the stack. 193af6ab5fSopenharmony_ci */ 203af6ab5fSopenharmony_cideclare class Stack<T> { 213af6ab5fSopenharmony_ci /** 223af6ab5fSopenharmony_ci * Constructor for Stack. 233af6ab5fSopenharmony_ci */ 243af6ab5fSopenharmony_ci constructor(); 253af6ab5fSopenharmony_ci 263af6ab5fSopenharmony_ci /** 273af6ab5fSopenharmony_ci * Pushes an element onto the stack. 283af6ab5fSopenharmony_ci * @param {T} element - The element to push. 293af6ab5fSopenharmony_ci */ 303af6ab5fSopenharmony_ci push(element: T): void; 313af6ab5fSopenharmony_ci 323af6ab5fSopenharmony_ci /** 333af6ab5fSopenharmony_ci * Pops an element from the stack. 343af6ab5fSopenharmony_ci * @returns {T} The popped element. 353af6ab5fSopenharmony_ci */ 363af6ab5fSopenharmony_ci pop(): T; 373af6ab5fSopenharmony_ci 383af6ab5fSopenharmony_ci /** 393af6ab5fSopenharmony_ci * Gets the size of the stack. 403af6ab5fSopenharmony_ci * @returns {number} The size of the stack. 413af6ab5fSopenharmony_ci */ 423af6ab5fSopenharmony_ci size(): number; 433af6ab5fSopenharmony_ci} 443af6ab5fSopenharmony_ci 453af6ab5fSopenharmony_ci/** 463af6ab5fSopenharmony_ci * An interface representing a geometric shape. 473af6ab5fSopenharmony_ci * @interface 483af6ab5fSopenharmony_ci */ 493af6ab5fSopenharmony_cideclare interface GeometricShape { 503af6ab5fSopenharmony_ci /** 513af6ab5fSopenharmony_ci * Calculates the area of the shape. 523af6ab5fSopenharmony_ci * @returns {number} The area of the shape. 533af6ab5fSopenharmony_ci */ 543af6ab5fSopenharmony_ci calculateArea(): number; 553af6ab5fSopenharmony_ci} 563af6ab5fSopenharmony_ci 573af6ab5fSopenharmony_ci/** 583af6ab5fSopenharmony_ci * A function to capitalize the first letter of a string. 593af6ab5fSopenharmony_ci * @param {string} str - The input string. 603af6ab5fSopenharmony_ci * @returns {string} The capitalized string. 613af6ab5fSopenharmony_ci */ 623af6ab5fSopenharmony_cideclare function capitalizeFirstLetter(str: string): string; 63