can someone tell me what is my mistake on my code? ( i've bold the part)

Question

there's 3 choices of college. but when i entered the college number, the output are same which is 5. can you guys help me?

#include <iostream>
using namespace std;
const int MAX_NAME_LENGTH = 50;
const int MAX_STUDENTS = 1000;

struct Student {
    char name[MAX_NAME_LENGTH];
    int id;
    string fee;
    int college;
};

void printStudents(const Student students[], int numStudents) {
    for (int i = 0; i < numStudents; i++) {
        cout << "Name: " << students[i].name << ", ID: " << students[i].id << ", College number: " << students[i].college << ", Fee: " << students[i].fee << endl;
    }
}

int main() {
    Student students[MAX_STUDENTS];
    int numStudents = 0;

    while (true) {
        cout << "1. Add student" << endl;
        cout << "2. Delete student" << endl;
        cout << "3. Print all students" << endl;
        cout << "4. Quit" << endl;
        cout << "Enter choice: ";

        int choice;
        cin >> choice;

        if (choice == 1) {
            if (numStudents < MAX_STUDENTS) {
                cout << "Enter student name: ";
                cin >> students[numStudents].name;

                cout << "Enter student ID: ";
                cin >> students[numStudents].id;

                cout << "Enter student college (5/11/12): ";
                cin >> students[numStudents].college;
                if (students[numStudents].college =  5){
                    students[numStudents].fee = "$80.00";
                }
                else if (students[numStudents].college =  11){
                    students[numStudents].fee = "$90.00";
                }
                else if(students[numStudents].college =  12){
                    students[numStudents].fee = "$100.00";
                }
                else {
                    cout<<"Wrong college"<<endl;
                }

                numStudents++;
            }
            else {
                cout << "Maximum number of students reached." << endl;
            }
        }
        else if (choice == 2) {
            cout << "Enter student ID to delete: ";
            int id;
            cin >> id;

            int index = -1;
            for (int i = 0; i < numStudents; i++) {
                if (students[i].id == id) {
                    index = i;
                    break;
                }
            }

            if (index != -1) {
                for (int i = index; i < numStudents - 1; i++) {
                    // Shift all elements after the deleted element one position to the left
                    for (int j = 0; j < MAX_NAME_LENGTH && students[i+1].name[j] != '\0'; j++) {
                        students[i].name[j] = students[i+1].name[j];
                    }
                    students[i].id = students[i+1].id;
                    students[i].college = students[i+1].college;
                }
                numStudents--;
            }
            else {
                cout << "Student not found." << endl;
            }
        }
        else if (choice == 3) {
            printStudents(students, numStudents);
        }
        else if (choice == 4) {
            break;
        }
    }

    return 0;
}

Answer 1

cout << "Enter student college (5/11/12): ";
cin >> students[numStudents].college;
if (students[numStudents].college == 5){
    students[numStudents].fee = "$80.00";
}
else if (students[numStudents].college == 11){
    students[numStudents].fee = "$90.00";
}
else if(students[numStudents].college == 12){
    students[numStudents].fee = "$100.00";
}
else {
    cout<<"Wrong college"<<endl;
}

The equal sign (=) is the assignment operator, the left hand side takes the value of the right hand side.

The double equal sign (==) is the equality comparison operator.

You assigned a value in your code instead of comparing values. With the fix proposed in yellow above, your code should work better now.

Comments

woahhh thankyou so much!! i dont remember that

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No worries. Good luck!

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Thanks! That was need me!