Question

我正在使用rand（）生成一个随机数，并将其显示在算术问题的上下文中。我每次都得到相同的两个数字。我每次如何使它们不同？

#include <iostream>
#include<cstdlib>

using namespace std;

int main()
{

    int numberOne = rand()%1000;
    int numberTwo = rand()%1000;
    int numberThree = numberOne + numberTwo;
    char input;

    cout  << " " << numberOne << endl;
    cout <<  "+" << numberTwo << endl;
    cout << "----";
    cin.get();
    cout << numberThree << endl;
}

Answer 1

#include <iostream>
#include<cstdlib>

using namespace std;

int main()
{

    /* initialize random seed: */
    srand (time(NULL));

    int numberOne = rand()%1000;
    int numberTwo = rand()%1000;
    int numberThree = numberOne + numberTwo;
    char input;

    cout  << " " << numberOne << endl;
    cout <<  "+" << numberTwo << endl;
    cout << "----";
    cin.get();
    cout << numberThree << endl;
}

为了获得随机数，您需要提供一个种子。

每次运行此c ++程序时如何获得不同的数字？

1 个答案: