Question

我正在尝试编写一个生成并输出x随机整数num的程序 - 尚未使用数组或更高级别的C ++（我在循环中，例如while，for等）。

num是20到50之间的随机数，x是10到15之间的随机数。

我还想计算并显示这些数字的最小，最大，总和和平均值。我希望我的Sample测试输出X个随机整数数（在我失败的样本运行的情况下，它应该是12随机整数）。

如何确保它显示所有x个整数，并且它在此列表中显示的每个整数是随机且唯一的，而不是重复相同的随机数（在我底部的失败样本运行中，此整数为37 ，但我希望它是12个不同的唯一数字）？

/*
OUTPUT SHOULD BE:
Generating 11 random numbers (11 is a random number between 10 to 15)...
...11 Random Numbers between 20 to 50:  26, 23, 48, 32, 44, 21, 32, 20, 49, 48, 34
Largest = 49
Smallest = 21
Sum = 377
Average = 377 / 11 = 34.3
*/

#include <stdlib.h>
#include <time.h>
#include <iostream>

using namespace std;


int main(void)
{
     srand(time(NULL));
{
while (true){
        int sum = 0;
        int x = 10+rand()%6;
        int denom = x+1;
        int num = 20+rand()%31;
        int largest;
        int smallest;

        cout<<"Generating " << x << " random numbers (" << x << " is between 10 and 15)... \n";
        cout << "..." << x << " Random Numbers between 20 to 50: ";
        cout << num << endl;

        while(x >= 0)
        {
        largest = num;
        smallest = num;
        sum = sum + num;
        x--;
        }

        int average = sum / denom;

        cout << "Largest = " << largest << endl;
        cout << "Smallest = " << smallest << endl;
        cout << "Sum = " << sum << endl;
        cout << "Average = " << average << endl;

            break;
    }
    return 0;
}
}

/*
SAMPLE RUNS
==========
Generating 12 random numbers (12 is between 10 and 15)...
...12 Random Numbers between 20 to 50: 37
Largest = 37
Smallest = 37
Sum = 481
Average = 37

Process returned 0 (0x0)   execution time : 0.159 s
Press any key to continue.
*/

Answer 1

仅使用一个循环。应在此循环中生成随机数num。

它应该是while (x > 0){... x--;}所以例如x == 1然后循环运行一次。您还可以使用更容易理解的for循环。

denom只是保存x的值。因此，它应该是x，而不是x+1

largest和smallest的值应在循环开始之前初始化。然后你必须测试值。

我使用零来初始化largest和非常大的值RAND_MAX来初始化smallest。

int main()
{
    srand((unsigned int)time(NULL));
    int largest = 0;
    int smallest = RAND_MAX;
    int sum = 0;
    int x = 10 + rand() % 6;
    int denom = x;
    cout << "x = " << x << endl;

    while (x > 0)
    {
        int num = 20 + rand() % 31;
        cout << "num = " << num << endl;

        if(num > largest)
            largest = num;

        if(num < smallest)
            smallest = num;

        sum += num;

        x--;
    }

    cout << "Largest = " << largest << endl;
    cout << "Smallest = " << smallest << endl;
    cout << "Sum = " << sum << endl;
    cout << "Average = " << sum / denom << endl;
    return 0;
}

C ++：随机数列表：x个随机整数

1 个答案: