我的 rand() 并没有真正在 C++ 中工作，特别是在 Visual Studio 2019 年。我确实有“包括 <time.h> 和 <stdlib.h>

Question

我的 rand() 为每个学生给出相同的数字 (GPA)。

srand(time(NULL));
    int gpa = 0 + (rand() % (10 - 0 + 1));

    for (int i = 0; i < number; i++) {
        cout << "Enter the student #" << i + 1 << "'s name: ";
        getline(cin, pStudents[i]); cout << endl;
    }
    for (int i = 0; i < number; i++) {
        cout << "Student " << pStudents[i] << " has GPA of: " << gpa << endl;
    }

Answer 1

您只需计算一次。

以下是如何在您的代码中修复它：

srand(time(NULL));
for (int i = 0; i < number; i++) {
    cout << "Enter the student #" << i + 1 << "'s name: ";
    getline(cin, pStudents[i]); cout << endl;
}
for (int i = 0; i < number; i++) {
    int gpa = 0 + (rand() % (10 - 0 + 1));
    cout << "Student " << pStudents[i] << " has GPA of: " << gpa << endl;
}

我的 rand() 并没有真正在 C++ 中工作，特别是在 Visual Studio 2019 年。我确实有“包括 <time.h> 和 <stdlib.h>

My rand() isn't really working in C++ specifically in Visual Studio 2019. I do have had "include <time.h> and <stdlib.h>

c++

visual-studio

random