Question

下面列出了我应该做的事情。程序运行但我无法在输出中输出正确的数字。我认为逻辑是正确的，但它不起作用。

我们获得了＃饼干，盒子将=饼干数除以24，如果有额外的饼干＆gt;比0我们添加一个框。

我们拿＃箱子，额外的箱子是＆gt; 0我们添加一个集装箱。

然后我们有了集装箱和箱子的总数。

我不知道为什么它不起作用，并且在过去3个小时内一直坚持这个问题，最后放弃并寻求帮助。

一盒饼干可容纳24个饼干，一个容器可容纳75盒饼干饼干。编写一个程序，提示用户输入总数 cookies，盒子里的饼干数量，以及饼干盒子的数量容器。程序然后输出框的数量和数量用于运送饼干的容器。请注意，每个框必须包含指定的 cookie的数量，每个容器必须包含指定的数量框。如果最后一盒cookie包含少于指定的数量 cookies，你可以丢弃它并输出剩余的cookie数量。同样的，如果最后一个容器包含少于指定框的数量，则可以丢弃它并输出剩余的盒子数量。因为这是一章选择控制结构，如果没有cookie或没有框剩下的剩余饼干或剩余的盒子不得输出。

#include<iostream>
#include<cmath>

using namespace std;

int main()

{
// Declare variables
    int cookies, extraCookies;
    int boxes,totalBoxes;
    int leftOverBoxes;
    int containers;
    boxes = (cookies/24);

    extraCookies = cookies%24;
    containers = boxes/75;
    leftOverBoxes = boxes%75;


//  Ask for the user input ( doesnt make sense because we are given the capacities)
    cout << " How many cookies do you have ?"<< endl;
    cin >> cookies;
    cout << " You have this many cookies: " << cookies << endl;

    cout << " How many cookies can you fit in one box ?" << endl;
    cin >> cookies;

    cout << " How many cookie boxes can you fit into a container ?" << endl;
    cin >> boxes;

    // Computer number of boxes needed
    if(extraCookies > 0)
      totalBoxes = (boxes + 1);
    cout <<" We need this many boxes:" << totalBoxes << endl;

    if(leftOverBoxes > 0)
      containers = ( containers + 1);
    cout << "We need this many containers: " << containers << endl;


    return 0;



    }

Answer 1

C ++从上到下阅读。请允许我为您的代码添加注释，解释正在发生的事情：

#include<iostream>
#include<cmath>

using namespace std; // Bad practice, by the way

int main()

{
// Declare variables
    int cookies, extraCookies; // cookies = 0, extraCookies = 0
    int boxes,totalBoxes; // boxes = 0, totalBoxes = 0
    int leftOverBoxes; // leftOverBoxes = 0
    int containers; // containers = 0
    boxes = (cookies/24); // boxes = 0/24 = 0, this line does nothing

    extraCookies = cookies%24; // extraCookies = 0%24 = 0, this line does nothing
    containers = boxes/75; // containers = 0/75 = 0, this line does nothing
    leftOverBoxes = boxes%75; // leftOverBoxes = 0%75 = 0, this line does nothing


//  Ask for the user input ( doesnt make sense because we are given the capacities)
    cout << " How many cookies do you have ?"<< endl;
    cin >> cookies;
    cout << " You have this many cookies: " << cookies << endl;

    cout << " How many cookies can you fit in one box ?" << endl;
    cin >> cookies; // You throw away how many cookies the user has, and rewrite it with how many cookies fit in one box

    cout << " How many cookie boxes can you fit into a container ?" << endl;
    cin >> boxes;

    // Computer number of boxes needed
    if(extraCookies > 0) // 0 > 0 == false
      totalBoxes = (boxes + 1);
    cout <<" We need this many boxes:" << totalBoxes << endl;

    if(leftOverBoxes > 0) // 0 > 0 == false
      containers = ( containers + 1);
    cout << "We need this many containers: " << containers << endl;


    return 0;



    }

您在从用户那里获取输入之前计算boxes，extraCookies，containers和leftOverBoxes。它们都被初始化为0。

您应该在收到用户的输入后计算出来。

将代码视为一系列指令。如果你还没有大量的饼干，你无法弄清楚你需要多少个盒子。

为什么我得错了输出 - 如果＆amp;其他陈述

1 个答案: