如何在 C++ 中根据用户输入编写循环？

Question

How do I run a loop based on the user input?

Example:

I ask how many students does the user want to calculate the grade.

if the user enters 2 students, then I will ask the user to input grades for exams, homework, quiz etc...

After the program calculate the first student grade, how do I run the loop again for the second student?

I tried using a while loop but it just goes to infinite loop.

What I did was:

cout << "number of student you want to calculate grade for" << endl; 

cin >> student; 

while (student) { 
... 
... 
... 
... 
} 

when I run this it goes to infinite loop.

Answer 1

you need to make sure you decrement student inside the loop as you check if there are any students left to get information for.

while(student > 0){ // check if any students left
    // your code to get student information
    student -= 1; // decrement students
}