Question

所以我的任务就是这个：“使用for循环打印出所有数字（在一行，空格分隔）之间高度和宽度（包括），然后打印这些数字的平均值（平均值）。“一切正常，直到我到达最底层，我不知道如何在boxWidth和boxHeight之间加上数字并找到它们平均值.boxWidth是我的“x”所以说，boxHeight是我的“y”。

void main() {
    int boxHeight = 0;
    int boxWidth;
    int x;
    int numOfItems;
    int sumTotal = 0;
    double average = 0;

    cout << "\tEnter a number from 3 to 10 inclusive: " << endl;
    cin >> boxHeight;
    //making a calculation for our boxHeight
    while (boxHeight < 3 || boxHeight > 10) {    
        //prompt them to try again if the number they entered isnt within the range we want.
        if (boxHeight >= 3 || boxHeight <= 10) {
            cout << "That number was not between 3 or 10 inclusive, try again: " << endl;
            cin >> boxHeight;
        }
    }

    cout << "The box's height is: " << boxHeight << endl;  
    //making a calculation for our boxWidth
    cout << "Enter a number for your box width that is greater than the height but smaller than 20:" << endl;
    cin >> boxWidth;
    while (boxWidth < boxHeight || boxWidth > 20) {
        //prompt them to try again if the number they entered isnt within the range we want.
       cout << "That number doesn't work here, try another: " << endl;
       cin >> boxWidth;
    }

    cout << "The numbers between the box's height and it's width are: " << endl;
    for (int i = boxHeight; i <= boxWidth; i++) {
         cout << i << " ";
         //this is where I'm stuck, can't add up the numbers "i" and then find their average
    }
}

Answer 1

您根本不需要循环来查找平均值

for (int i = boxHeight; i <= boxWidth; ++i) {
    std::cout << i << " ";
}
std::cout << std::endl;
std::cout << double(boxWidth + boxHeight) / 2;

Answer 2

您可以添加addidional变量，因此您的循环可能如下所示：

int total = 0;
int size = 0;

for (int i = boxHeight; i <= boxWidth; i++) 
{
    total += i;
    size++;
}

然后打印平均值：

cout<<"average:"<<(float)total/size<<endl;

Answer 3

加起来并获得平均值

int total = 0, count = 0;
for (int i = boxHeight; i <= boxWidth; i++) {
    cout << i << " ";
    total = total + i;
    count++;
}
cout << endl;

float avg = (float)total / count;
cout << "Average is " << avg << endl;

打印x＆amp;之间的所有数字y，＆amp;找到这些数字的平均值

3 个答案: