C ++中的常见问题 [英] A common problem in C++

问题描述

我正面临一个错误，那就是演示错误。作为一个初学者到c ++，我被困在下面列出的一个问题：



两辆车（X和Y）离开同一个方向。 X车以60 km / h的恒定速度离开，Y车以90 km / h的恒定速度离开。



一小时（60分钟） ）Y车可以与X车相距30公里，换句话说，它可以每2分钟逃离一公里。



阅读距离（以km为单位）并计算汽车Y相对于另一辆汽车需要多长时间（以分钟为单位）。



:::输入： ::



30



:::输出::::



60分钟（葡萄牙语分钟数）



我尝试过的事情：



现在，在提交代码后，它会显示错误。所以提前给出一个解决方案。



:::::::::::::::::::::::::::::::::::: :::

I am facing an error, that is presentation error.Being a beginner to c++ , i am stucked on a question which listed below:

Two cars (X and Y) leave in the same direction. The car X leaves with a constant speed of 60 km/h and the car Y leaves with a constant speed of 90 km / h.

In one hour (60 minutes) the car Y can get a distance of 30 kilometers from the X car, in other words, it can get away one kilometer for each 2 minutes.

Read the distance (in km) and calculate how long it takes (in minutes) for the car Y to take this distance in relation to the other car.

:::Input:::

30

:::Output::::

60 minutos (minutes in portuguese)

What I have tried:

Now, upon submitting the code it says presentation error. So give a solution ,thanx in advance.

:::::::::::::::Below my code::::::::::

#include <iostream>
using namespace std;

int main(){

int Y;

cin >> Y ; 
cout << 2*Y << " minutos " << endl;

return 2*Y;

}

推荐答案

您的代码是正确的（但主要功能，按惯例，成功时应返回 0 ：'演示错误'不是 C ++ 错误，它看起来比赛你提交给你的程序只是不喜欢输出。

Your code is correct (but the main function, by convention, should return 0 on success): 'presentation error' is not a C++ error, it looks the contest you are submitting to your program just doesn't like the output.

什么编译器允许这样做没有错误

What compiler is allowing this thru without an error

#include

?????真的通过你的编译器..我被惊呆了



我会因为提交那行代码而彻底失败



可能会问你实际编译代码的问题吗？

????? really gets thru your compiler .. I am stunned

I would fail you outright just for submitting that line of code

Probably begs the question have you actually compiled your code?

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