C++:随机数列表:x 个随机整数

C++: Random Number lists: x number of random integers

本文关键字：随机 整数 列表 随机数 C++      更新时间：2023-10-16

我正在尝试编写一个生成和输出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 是介于 20 到 50 之间的随机数，x 是介于 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。我希望我的样本测试输出 X 个随机整数(在样本运行失败的情况下，它应该是 12 个随机整数(。

如何确保它显示所有 x 整数，并且它在此列表中显示的每个整数都是随机且唯一的，而不是重复相同的随机数(在底部失败的示例运行中，这个整数是 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.
*/

只使用一个循环。应在此循环中生成随机数num。

它应该是while (x > 0){... x--;}，例如，如果x == 1那么循环运行一次。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的，而不是x+1

应在循环开始之前初始化largest和smallest的值。然后，您必须测试这些值。

我用零来初始化largest，用一个非常大的值来初始化smallestRAND_MAX。

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;
}
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