Question

我目前正在学习C ++，并希望进行以下练习：需要：

变量，数据类型和数字运算符基本输入/输出逻辑（if语句，switch语句）循环（for，while，do-while）阵列

写一个程序，要求用户输入由10个不同的人（第1人，第2人，......，第10人）吃早餐的煎饼数量一旦输入数据，程序必须分析数据并输出哪个人吃早餐最煎饼。

★修改程序，以便输出哪个人吃早餐的煎饼数量最少。

★★★★修改程序，使其按照所有10个人吃的煎饼数量顺序输出一个列表。即人4：吃了10个煎饼人3：吃了7个煎饼人8：吃了4个煎饼 ... 人5：吃了0个煎饼

Sofar我已经得到了＃34;吃得最多＆＃34;并且＆＃34;第二多＆＃34;，但我遇到了问题＆＃34;最少＆＃34;部分...

这是我的代码：

#include <iostream>
using namespace std;
int arrayPersonsPancakes[]={};
int arrayPersonsNr;

int createArrayforPersons();
void pancakesPerPerson(int);
void whoAteTheMost();


int main(){
int arrayPersonsNr = createArrayforPersons();
pancakesPerPerson(arrayPersonsNr);
whoAteTheMost();

/*for(int i=0; i < arrayPersonsNr; i++){
   cout << arrayPersonsPancakes[i] << endl;
}*/

}

int createArrayforPersons(){
cout << "Please enter the Nr. Of Persons who ate breakfast: " << endl;
int nrOfPersons;
cin >> nrOfPersons;
arrayPersonsPancakes[nrOfPersons];
return nrOfPersons;
}

void pancakesPerPerson(int nrOfPersons){
for (int i=0; i < nrOfPersons; i++){
    cout << "Please enter how many pancakes person Nr." << i+1 << " ate: " << endl;
    cin >> arrayPersonsPancakes[i];
    }

}
void whoAteTheMost(){
    int theMost= arrayPersonsPancakes[0];
    int theSecondMost;
    int theLeast;
for(int i = 0; i < arrayPersonsNr; i++){
    if (arrayPersonsPancakes[i] > theMost){
        theSecondMost = theMost;
        theMost = arrayPersonsPancakes[i];
                }
    }

theLeast = theMost;

 cout << theLeast << endl; //Here I get the normal output

for(int y = 0; y < arrayPersonsNr; y++){
    if (theLeast >  arrayPersonsPancakes[y]) {
        theLeast = arrayPersonsPancakes[y];
    }
}

cout << "after for " << theLeast << endl;  //I always get a zero here after the loop and have no idea why.
}

for(int j = 0; j < arrayPersonsNr; j++){
    if (arrayPersonsPancakes[j] == theMost){
        cout << "Person Nr." << j+1 << " ate the most Pancakes: " << theMost << endl;}
    else if (arrayPersonsPancakes[j] == theSecondMost){
        cout << "Person Nr." << j+1 << " ate the second most Pancakes: " << theSecondMost << endl;}
   else if (arrayPersonsPancakes[j] == theLeast){
        cout << "Person Nr." << j+1 << " ate the least Pancakes: " << theLeast << endl;}

    }
}

Loop for＆＃34; theleast＆＃34;无论我做什么，我总是得到零。我对如何编写代码以及如何改进代码表示感谢（无论当前是否缺少评论，对此感到抱歉）

谢谢！

Answer 1

您正在主要功能

中创建局部变量arrayPersonsNr

int main(){    
        int arrayPersonsNr = createArrayforPersons(); // This is local variable
        pancakesPerPerson(arrayPersonsNr);
        whoAteTheMost();
    }

将代码修改为

int main(){
    arrayPersonsNr = createArrayforPersons(); // This is global variable
    pancakesPerPerson(arrayPersonsNr);
    whoAteTheMost();
}

从learncpp.com做基本练习，输出＆＃34;最少数量＆＃34;在Pancake Glutton是不对的

1 个答案: