HackerRank：- 第 4 天：类与实例，出于某种原因出现一些奇怪的错误

Question

此测试出错：- https://www.hackerrank.com/challenges/30-class-vs-instance/problem?h_r=next-challenge&h_v=zen 一个测试用例由于某种原因失败了，当我在我的 IDE 中运行它时，它给出了与预期相同的输出，帮助我找出我错过了什么，我是非常初学者级别的编码器，从 Civil Engg 背景移动，所以如果出现错误，我很抱歉真的很傻。我的代码：

#include <iostream>
using namespace std;

class Person{
    public:
        int age;
        Person(int initialAge);
        void amIOld();
        void yearPasses();
    };

    Person::Person(int initialAge){
        if (initialAge < 0){
            this->age=0;
            cout << "Age is not valid, setting age to 0.";
        }
        else {
            this->age = initialAge;
        }

    }

    void Person::amIOld(){
        if(age < 13){
            cout << "\nYou are young.";
        }
        else if (age >= 13 && age < 18) {
            cout << "\nYou are a teenager.";
        }
        else {
            cout << "\nYou are old.";
        }
    }

    void Person::yearPasses(){
        age++;
    }

int main(){
    int t;
    int age;
    cin >> t;
    for(int i=0; i < t; i++) {
        cin >> age;
        Person p(age);
        p.amIOld();
        for(int j=0; j < 3; j++) {
            p.yearPasses(); 
        }
        p.amIOld();

        cout << '\n';
    }

    return 0;
}

Answer 1

这是你放在开头而不是结尾的新行结尾，

cout << "\nYou are old.";

把它们放在最后应该可以解决它。这些测试检查准确的输出，很多时候答案似乎正确，但轻微的输出差异会使测试用例失败。

为什么失败的解释：通过将行尾放在开头，您假设已经有一个输出/行。因此，在初始年龄不

Answer 2

您还需要将 this->age 放在第二个函数上

void Person::amIOld(){
    if(this->age < 13){ //you need to put this->age all age as well
        cout << "\nYou are young.";
    }
    else if (this->age >= 13 && this->age < 18) {//you need to put this->age all age as well
        cout << "\nYou are a teenager.";
    }
    else {
        cout << "\nYou are old.";
    }
}

您还需要将 this->age 也放在最后一个函数中

void Person::yearPasses(){
    this->age++; //you need to put this->age all age as well
}

Answer 3

#python 3

class Person:
    def __init__(self,initialAge):
        if initialAge < 3:
            print('Age is not valid, setting age to 0.')
            self.age = 0
        else:
            self.age = initialAge
        # Add some more code to run some checks on initialAge
    def amIOld(self):
        if self.age < 13:
            print("You are young.")
        elif self.age < 18:
            print("You are a teenager.")
        else:
            print("You are old. " , ) 
        # Do some computations in here and print out the correct statement to the console
    def yearPasses(self):
        self.age += 1
        # Increment the age of the person in here




t = int(input())
for i in range(0, t):
    age = int(input())         
    p = Person(age)  
    p.amIOld()
    for j in range(0, 3):
        p.yearPasses()       
    p.amIOld()
    print("")