Question

我正在尝试计算并显示c ++中5个数字的平均值，我正在挑战自己不要使用：全局变量，标签或go-to语句，无限循环和break语句来退出循环。我被卡住了，任何人都可以帮我解决这个问题：我需要提示用户结束5个数字，然后计算并显示5个数字的平均值。谢谢。

这是我尝试过的代码：

#include <iostream>

using namespace std;

int main(int argc, char** argv) {

    // create a variable x.
    int x; 
    // create a variable called average to get the 5 numbers
    // calculation. 
    int average; 

    // Prompt the user to enter five numbers. 
    cout << "Please enter five numbers." << endl;
    cout << average << endl;

  // Calculate the five numbers. 
    average = x;
    cout << "The average for the five numbers are:" << average << endl;
    return 0;
}

Answer 1

使用数组的解决方案。

frame(S) = struct('cdata',[],'colormap',[]);    % pre-allocate frames structure

for i = 1 : round(N/S) : N

some plotting code..

axis equal 

drawnow;

frame(i) = getframe();

end

Answer 2

您可以使用以下代码，我使用的变量与您使用的变量非常相似（这只是一个代码段）：

int x;
int sum=0; 
cout << "Please enter five numbers." << endl;
for(int i=0; i<5; i++){
    cin>>x;
    sum += x;
}
cout << sum/5.0 << endl;

修改

如果您根本不想使用循环，那么您可以使用称为递归的技术来执行此操作：

// Example program #include <iostream> #include <string> int calc(int sum, int i){ if(i == 0){ return sum; }else{ int x; std::cin>>x; i--; sum+=x + calc(sum, i); } return sum; } int main() { int i=5; int sum=0; sum = calc(sum, i); std::cout<<std::endl<<sum/5.0; return 0; }

这是我使用的编辑器的link。

我希望这很有帮助。

Answer 3

我已经解决了我自己的问题。正如我所说，我正在避免global variables, labels or go-to statements, infinite loops, and break statements to exit loops。所以，这是我的答案：

这是我的代码：

#include <iostream>
using namespace std;

int main() {
 // Creating variables.
 float v, w, x, y, z, average;
 // Prompting the user to enter first number.
 cout << "Please enter first number: ";

 // Getting the input from the user.
 cin >> v;
 // Prompting the user to enter second number.
 cout << "Please enter second number ";

 // Getting the input from the users.
 cin >> w;
 // Prompting the user to enter third number.
 cout << "Please enter third number ";

 // Getting the input from the user.
 cin >> x;
 // Prompting the user to enter fourth number.
 cout << "Please enter fourth number ";

 // Getting the input from the user.
 cin >> y;

 // Prompting the user to enter fifth number.
 cout << "Please enter fifth number ";

 // Getting the input from the user.
 cin >> z;
 // Calculating the average of those user input five numbers.
 average = (v + w + x + y + z) / 5; 

// Displaying the total average of the five numbers entered.
 cout << "The average of the five numbers is:" << average << endl;
 return 0; 
}

Answer 4

这里有一些应该有用的代码：

#include <iostream>
#include <stdio.h>
using namespace std;

int main(int argc, char** argv) {

    int main(int argc, char** argv) {

    float x = 0; 
    int i;
    int a;
    int size;

    cout << "How many numbers? ";
    cin>> size;
    for (i = 1; i <= size; i++) {
        cout << "Please enter number #" << i << ": ";
        cin >>a;
        x += a;
    }

    cout << "The average for the five numbers are: " << x/(float)size << endl;

    return 0;
}

当程序询问有多少个数字时，你可以输入5（它只是让你找到一些数值的平均值）。希望这有帮助！

如何计算和显示C ++中5个数字的平均值？

4 个答案:

这是我使用的编辑器的link。