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Program not waiting for cin
(3 answers)
Closed 7 years ago.
I'm very new to C++ and for my assignment they want me to create a function that gets the users input which I've done here: (classList is an array)
public:
void userInput() {
string enterAgain;
do {
cout << "Enter the students name: " << name;
cin >> name;
cout << "Enter the number of classes the student is enrolled in: " << numClasses;
cin >> numClasses;
for (int i = 0; i < numClasses; i++) {
cout << "Enter the class list: " << (i+1) << classList;
cin >> classList;
i++;
}
cout << "Would you like to enter again (y for yes): " << enterAgain;
cin >> enterAgain;
} while (enterAgain == "Y" || enterAgain == "y");
}
When I run the program it will ask the user for the students name followed by the number of classes they're taking, but when it ask the user to input the class list it displays something like this:
Enter the class list: 0x7fff536d1b78
But in addition to this it won't let me input anything. I searched for hours trying to correct this problem and I was hoping someone could point me in the right direction in correcting this problem. Thanks!
public:
void userInput() {
string enterAgain;
do {
cout << "Enter the students name: " << name;
cin >> name;
cout << "Enter the number of classes the student is enrolled in: " << numClasses;
cin >> numClasses;
for (int i = 0; i < numClasses; i++) {
cout << "Enter the class list: " << (i+1) << classList;
cin >> classList;
i++;
}
cout << "Would you like to enter again (y for yes): " << enterAgain;
cin >> enterAgain;
} while (enterAgain == "Y" || enterAgain == "y");
}
should be-
public:
void userInput() {
string enterAgain;
do {
cout << "Enter the students name: " << endl;
cin >> name;
cout << "Enter the number of classes the student is enrolled in: " << endl;
cin >> numClasses;
for (int i = 0; i < numClasses; i++) {
cout << "Enter the class list: " << (i+1) << endl;
cin >> classList[i];
}
cout << "Would you like to enter again (y for yes): " << endl;
cin >> enterAgain;
} while (enterAgain == "Y" || enterAgain == "y");
}
Related
Here is the link to the assignment
I managed to get the majority of the project working except the void finalSales() function. I'm not too sure how to go about it with a one and two-dimensional array and display it accordingly. I have a midterm exam coming up next week and this chapter is included. I added some comments on what the functions do below:
#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
bool isPlaying = true, isPlaying_Two = true, isPlaying_Three = true, isLooping = true;
string salesPerson[6] = { "Jericho Rosales", "lisa Soberano", "Kim Chiu", "maja Salvador", "Katheryn Bern", "Daniel Padilla" },
items[3] = { "Washing Machine", "Refrigerator", "Music System" };
double table[6][3], totalSales[6] = {0};
int salesNum, productNum;
double saleAmount;
void Sales();
void person();
void prod();
void finalSales();
int main()
{
while (isLooping) {
Sales();
}
}
//main game
void Sales() {
while (isPlaying)
{
person();
if (salesNum > 0 && salesNum < 7) {
//cout << "debug " << salesPerson[salesNum - 1];//debug
cout << "\n";
while (isPlaying_Two)
{
prod();
if (productNum > 0 && productNum < 4) {
//cout << "debug " << items[productNum - 1];//debug
while (isPlaying_Three)
{
finalSales();
}
}
else
{
cout << "\n";
cout << "Input out of range, please try again\n";
cout << "\n";
}
}
}
else {
cout << "\n";
cout << "Input out of range, please try again\n";
cout << "\n";
}
}
}
//user selects which salesperson
void person() {
cout << "Sales Registry\n";
for (int i = 0; i < 6; i++)
{
cout << i + 1 << ". " << salesPerson[i] << "\n";
}
cout << "Select the Salesperson by typing his ordinal number: ";
cin >> salesNum;
//check if cin failed
while (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid entry, enter again ";
cin >> salesNum;
}
}
//user selects which product
void prod() {
for (int i = 0; i < 3; i++)
{
cout << i + 1 << ". " << items[i] << "\n";
}
cout << "Select the product by typing the product ordinal number: ";
cin >> productNum;
//check if cin failed
while (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid entry, enter again ";
cin >> productNum;
}
}
//get the sales amount(enter a random number in) and
//if the user wants to enter more sales it goes back to the beginning and asks again while remembering the previous values
//if not then the program adds up the amount (if there is more than one) and displays it accordingly to the salesperson and the product
void finalSales() {
string again;
cout << "Enter the sales amount: ";
cin >> saleAmount;
//check if cin failed
while (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid entry, enter again ";
cin >> saleAmount;
}
cout << "Do you want to enter more sales? Type y for yes and n for no: ";
cin >> again;
//check if cin failed
while (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid entry, enter again ";
cin >> saleAmount;
}
if (again == "y" || again == "Y") {
Sales();
}
else {
cout << "\n";
cout << "Salesperson" << "\t\t" << "Washing Machine" << "\t\t" << "Refrigerator" << "\t\t" << "Music system\n";
cout << "****************************************************************************************************";
cout << "\n";
for (int x = 0; x < 6; x++)
{
cout << salesPerson[x];
for (int y = 0; y < 3 ; y++)
{
cout << "\t\t\t" << table[x][y];
}
cout << "\n";
}
}
}
You need to return index from person() and prod() then pass them to finalSales. Also pass array to it and increase the amount of product by the saleAmount. And don't forget to make your bool variables false or you end up with infinite loop. Create two int variables in Sales(). Initialize them by returning the index from person() and the other one from product().
void finalSales(int idx1, int idx2,double table[6][3]) {
string again;
cout << "Enter the sales amount: ";
cin >> saleAmount;
table[idx1][ idx2] = saleAmount;
//check if cin failed
while (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid entry, enter again ";
cin >> saleAmount;
}
cout << "Do you want to enter more sales? Type y for yes and n for no: ";
cin >> again;
//check if cin failed
while (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid entry, enter again ";
cin >> saleAmount;
}
if (again == "y" || again == "Y") {
Sales();
}
else {
::isPlaying_Three = false;
::isPlaying_Two = false;
::isPlaying = false;
::isLooping = false;
cout << "\n";
cout << "Salesperson" << "\t\t" << "Washing Machine" << "\t\t" << "Refrigerator" << "\t\t" << "Music system\n";
cout << "****************************************************************************************************";
cout << "\n";
for (int x = 0; x < 6; x++)
{
cout << salesPerson[x];
for (int y = 0; y < 3; y++)
{
cout << "\t\t\t" << table[x][y];
}
cout << "\n";
}
}
}
That's for person() and the same for prod().
int person() {
cout << "Sales Registry\n";
for (int i = 0; i < 6; i++)
{
cout << i + 1 << ". " << salesPerson[i] << "\n";
}
cout << "Select the Salesperson by typing his ordinal number: ";
cin >> salesNum;
//check if cin failed
while (cin.fail()) {
cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');
cout << "Invalid entry, enter again ";
cin >> salesNum;
}
return salesNum-1;
}
Don't forget to decrease index by 1.
I have created a struct questions with the element testQuestion, answerQuestion and point. I also created a void function which is connected to the elements of the struct. When I call the function and input the question, the program does not continue to the other element which is the answer but turns back to input username and password.
Why does this happen?
struct professor
{
string username;
string password;
};
professor professorData;
struct question
{
char testQuestion[50];
char answerQuestion[50];
int pointQuestion;
};
question questionData;
void readProfessor(professor &professorData)
{
cout << "Enter the professor username: ";
cin >> professorData.username;
cout << "Enter the professor password: ";
cin >> professorData.password;
cout << endl;
}
void readQuestion(question &questionData)
{
cout << "Enter the question: " << endl;
cin >> questionData.testQuestion;
cout << "Enter the answers: " << endl;
cin >> questionData.answerQuestion;
}
void professorMenu()
{
string pUsername;
string pPassword;
cout << "Enter professor username: ";
cin >> pUsername;
cout << "Enter professor password: ";
cin >> pPassword;
if ((pUsername.compare(professorData.password) == 0) && (pPassword.compare(professorData.password) == 0))
{
readQuestion(questionData);
}
}
Calling from here
adminMenu()
{
int adminUsername = 1234;
int inputAdminUsername;
char adminPassword[6] = "admin";
char inputAdminPassword[6];
int a;
string inputStudent[20];
string inputProfessor[20];
cout << "Enter admin username: ";
cin >> inputAdminUsername;
cout << "Enter admin password: ";
cin >> inputAdminPassword;
if (inputAdminUsername == adminUsername && strcmp(adminPassword, inputAdminPassword) == 0)
{
cout << "Successful login." << endl;
do
{
cout << "Press 1 to add professor" << endl;
cout << "Press 2 to add student" << endl;
cout << "Press 3 to go back to main menu" << endl;
cin >> a;
if (a == 1)
{
readProfessor(professorData);
}
else if (a == 2)
{
readStudent(studentData);
}
else if (a == 3)
mainMenu();
} while (a != 3);
}
}
I am supposed to write a program with two classes, Employee and Department. When the main() function runs, it asks the user to choose one of the six numbered options that are displayed and creates arrays for Employee and Department objects. I'm disregarding every other option except option 1, the Create Department Option, so the focus of this issue will be the Department class and the Department department[3] array.
There is a while loop in the main() function that continuously runs until the user decides to exit. If the user enters option 1, a Department array object is created, and then the user also enters the departmentID, departmentName, and departmentHeadName for that object. The while loop notifies the user if the array has three Employee objects. However, I am having difficulties because each departmentID needs to be unique. For example, I cannot enter 1 for the first array object's departmentID, and then enter 1 again for the second array object's departmentID. How do I check if the user's departmentID input already exists in a previous object?
#include <iostream>
#include <string>
using namespace std;
// Employee Class
class Employee
{
private:
string employeeID;
string employeeName;
string employeeDepartmentID;
double employeeSalary;
int employeeAge;
public:
void createEmployee()
{
cout << "Please Enter Employee Details:" << endl;
cout << "Employee ID : ";
cin >> employeeID;
cout << "Employee Name :";
cin >> employeeName;
cout << "Salary: $";
cin >> employeeSalary;
cout << "Age : ";
cin >> employeeAge;
cout << "Department ID : ";
cin >> employeeDepartmentID;
}
};
// Department Class
class Department
{
private:
string departmentID;
string departmentName;
string departmentHeadName;
public:
void createDepartment()
{
cout << "Please Enter Department Details: \n";
cout << "Department ID : ";
cin >> departmentID;
cout << "Department Name : ";
cin >> departmentName;
cout << "Head of Department : ";
cin >> departmentHeadName;
}
};
// Function prototype
void displayMenu();
// Client main function
int main()
{
Employee employee[5];
Department department[3];
int choice;
int departmentCount = 0;
int employeeCount = 0;
while (true)
{
displayMenu();
cin >> choice;
if (choice == 1 && departmentCount < 3)
{
department[departmentCount].createDepartment();
departmentCount = departmentCount + 1;
}
else if (choice == 1 && departmentCount >= 3)
{
cout << "\nThe array is full, you can not add any more Departments." << endl;
}
else if (choice == 2 && employeeCount < 5)
{
employee[employeeCount].createEmployee();
employeeCount = employeeCount + 1;
}
else if (choice == 2 && employeeCount >= 5)
{
cout << "The array is full, you can not add any more Employees." << endl;
}
else if (choice == 6)
{
cout << "Thank you, goodbye." << endl;
break;
}
}
return 0;
}
// Display menu function
void displayMenu()
{
cout << "1. Create Department" << endl;
cout << "2. Create Employee" << endl;
cout << "3. Write Out Data File" << endl;
cout << "4. Read In Data File" << endl;
cout << "5. Display Salary Report" << endl;
cout << "6. -- Quit -- " << endl;
cout << "Please make a selection : ";
}
try this one
#include <iostream>
#include <string>
using namespace std;
// Employee Class
class Employee
{
private:
string employeeID;
string employeeName;
string employeeDepartmentID;
double employeeSalary;
int employeeAge;
public:
void createEmployee()
{
cout << "Please Enter Employee Details:" << endl;
cout << "Employee ID : ";
cin >> employeeID;
cout << "Employee Name :";
cin >> employeeName;
cout << "Salary: $";
cin >> employeeSalary;
cout << "Age : ";
cin >> employeeAge;
cout << "Department ID : ";
cin >> employeeDepartmentID;
}
};
// Department Class
class Department
{
private:
string departmentID;
string departmentName;
string departmentHeadName;
public:
void createDepartment()
{
cout << "Please Enter Department Details: \n";
cout << "Department ID : ";
cin >> departmentID;
cout << "Department Name : ";
cin >> departmentName;
cout << "Head of Department : ";
cin >> departmentHeadName;
}
public:
string getDepartmentID(){
return departmentID;
}
};
// Function prototype
void displayMenu();
// Client main function
int main()
{
Employee employee[5];
Department department[3];
int choice;
int departmentCount = 0;
int employeeCount = 0;
while (true)
{
displayMenu();
cin >> choice;
if (choice == 1 && departmentCount < 3)
{
department[departmentCount].createDepartment();
for(int i=0;i<departmentCount;i++)
{
if(department[i].getDepartmentID()==department[departmentCount].getDepartmentID())
{
cout<<"already exists......................... \n";
}
}
departmentCount = departmentCount + 1;
}
else if (choice == 1 && departmentCount >= 3)
{
cout << "\nThe array is full, you can not add any more Departments." << endl;
}
else if (choice == 2 && employeeCount < 5)
{
employee[employeeCount].createEmployee();
employeeCount = employeeCount + 1;
}
else if (choice == 2 && employeeCount >= 5)
{
cout << "The array is full, you can not add any more Employees." << endl;
}
else if (choice == 6)
{
cout << "Thank you, goodbye." << endl;
break;
}
}
return 0;
}
// Display menu function
void displayMenu()
{
cout << "1. Create Department" << endl;
cout << "2. Create Employee" << endl;
cout << "3. Write Out Data File" << endl;
cout << "4. Read In Data File" << endl;
cout << "5. Display Salary Report" << endl;
cout << "6. -- Quit -- " << endl;
cout << "Please make a selection : ";
}
I used getDepartmentID function in Department Class to get department id from each department object
public:
string getDepartmentID(){
return departmentID;
}
there should be return type is string.because you have created departmentID as a string.
and I used For Loop in main function to compare relevant department id already exists or not
for(int i=0;i<departmentCount;i++)
{
if(department[i].getDepartmentID()==department[departmentCount].getDepartmentID())
{
cout<<"already exists......................... \n";
}
}
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Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
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the program works fine and executes all options, but in the 3rd and 4th option, in 3rd when i search for a student the program doesn't go beyond the data input part while in 4th when i search for data and print it, it gives garbage values in the variables with int datatype while doesn't display string or char type variables. any help would be much appreciated. EDIT: sorry for the inconvenience, I've now separated the functions form the main code. Hope its its more understandable now.
#include<iostream>
#include<string>
using namespace std;
int ncr;
int me,n=0,u,y,l;
char opt1,opt2,opt3,opt4;
struct student
{
string Name;
int DoB;
int Age;
string Address;
string Course[5];
char grade[5];
};
void add();
void remove();
void update();
void search();
int main()
{ int opt;
student s[n];
while(1)
{
cout<<" select what you want to do \n\n 1. Add new record \n2. Remove record\n3. Update Record\n4. Search for particular student\n" ;
cin>>opt;
if(opt==1)
{add();}
else if(opt==2)
{remove();}
else if(opt==3)
{update();}
else if(opt==4)
{search();}
}
}
.
void add(){
n++;
student s[n];
do
{ cout<<"enter name of student ";
cin>>s[n-1].Name;
cout<<"enter DoB of student ";
cin>>s[n-1].DoB;
cout<<"enter age of student ";
cin>>s[n-1].Age;
cout<<"enter address of student ";
cin>>s[n-1].Address;
cout<<"enter courses and grades (max 5) \n";
for(int x=0;x<5;x++){
cout<<"course:";
cin>>s[n-1].Course[x];
cout<<"grade:";
cin>> s[n-1].grade[x];}
cout<<"Roll No. : "<<n<<"\nName :"<<s[n-1].Name<<"\nDoB :"<<s[n-1].DoB<<"\nAge :"<<s[n-1].Age<<"\nAddress :"<<s[n-1].Address;
for(int x=0;x<5;x++){
cout<<"\n"<<s[n-1].Course[x];
cout<<" grade : "<< s[n-1].grade[x]<<"\n";}
cout<<"repeat for another student 'y' or 'n' ?";
cin>>opt1;
}
while(opt1=='y'|| opt1=='Y');
}
.
void remove(){student s[n];
do
{
cout<<"enter student roll no to remove data";cin>>l;
for(int i=l;i<n;i++)
{ s[l-1].Name=s[l].Name;
s[l-1].DoB= s[l].DoB;
s[l-1].Age=s[l].Age;
s[l-1].Address=s[l].Address;
for(int j=0;j<5;j++){
s[l-1].Course[j]=s[l].Course[j];
s[l-1].grade[j]=s[l].grade[j];}
}
cout<<"Record Removed\n";
n--;
cout<<"repeat ? 'y' or 'n' ";
cin>>opt2;
}
while(opt2 == 'y' || opt2 == 'Y');}
.
void update(){
student s[n];
do
{
cout<<"enter the roll no of student you want to update data";
cin>>u;
cout<<"Roll No. : "<<u;
cout<<"\nName : ";
cout<<s[u-1].Name;
cout<<"\nDoB : ";
cout<<s[u-1].DoB;
cout<<"\nAge : ";
cout<<s[u-1].Age;
cout<<"\nAddress :";
cout<<s[u-1].Address;
cout<<"\nCourses and Grades\n";
for(int r=0;r<5;r++)
{
cout<<s[u-1].Course[r];
cout<<"\t"<< s[u-1].grade[r]<<endl;
}
cout<<"enter name of student ";
cin>>s[u-1].Name;
cout<<"enter DoB of student ";
cin>>s[u-1].DoB;
cout<<"enter age of student ";
cin>>s[u-1].Age;
cout<<"enter address of student ";
cin>>s[u-1].Address;
cout<<"enter courses and grades (max 5) \n";
for(int x=0;x<5;x++){
cout<<"course:";
cin>>s[u-1].Course[x];
cout<<"grade:";
cin>> s[u-1].grade[x];}
cout<<"Roll No. : "<<u;
cout<<"\nName : ";
cout<<s[u-1].Name;
cout<<"\nDoB : ";
cout<<s[u-1].DoB;
cout<<"\nAge : ";
cout<<s[u-1].Age;
cout<<"\nAddress :";
cout<<s[u-1].Address;
cout<<"\nCourses and Grades\n";
for(int r=0;r<5;r++)
{ cout<<s[u-1].Course[r];
cout<<"\t"<< s[u-1].grade[r]<<endl; }
cout<<"repeat ? 'y' or 'n' ";
cin>>opt3;
}
while(opt3 == 'y' || opt3 == 'Y');
}
.
void search(){
student s[n];
do
{
cout<<"enter the roll no of student you want to search data of";
cin>>y;
cout<<"Roll No. : "<<n<<"\nName :"<<s[y-1].Name<<"\nDoB :"<<s[y-1].DoB<<"\nAge :"<<s[y-1].Age<<"\nAddress :"<<s[y-1].Address<<"\nCourses and Grades\n";
for(int r=0;r<5;r++)
{
cout<<s[y-1].Course[r];
cout<<"\t"<< s[y-1].grade[r]<<endl;
}
cout<<"repeat ? 'y' or 'n' ";
cin>>opt4;
}
while(opt4 == 'y' || opt4 == 'Y');}
This should look a bit more like a code intended for humans to read :)
#include<iostream>
#include<string>
using namespace std;
int ncr;
int me,n=0,u,y,l;
char opt1,opt2,opt3,opt4;
struct student
{
string Name;
int DoB;
int Age;
string Address;
string Course[5];
char grade[5];
};
void add();
void remove();
void update();
void search();
int main()
{
int opt;
student s[n];
while(1)
{
cout << " select what you want to do \n\n 1. Add new record \n2. Remove record\n3. Update Record\n4. Search for particular student\n" ;
cin >> opt;
if(opt==1)
{
add();
}
else if(opt==2)
{
remove();
}
else if(opt==3)
{
update();
}
else if(opt==4)
{
search();
}
}
}
void add()
{
n++;
student s[n];
do
{
cout << "enter name of student ";
cin >> s[n-1].Name;
cout << "enter DoB of student ";
cin >> s[n-1].DoB;
cout << "enter age of student ";
cin >> s[n-1].Age;
cout << "enter address of student ";
cin >> s[n-1].Address;
cout << "enter courses and grades (max 5) \n";
for(int x=0;x<5;x++)
{
cout<<"course:";
cin>>s[n-1].Course[x];
cout<<"grade:";
cin>> s[n-1].grade[x];
}
cout << "Roll No. : " << n << "\nName :" << s[n-1].Name << "\nDoB :" << s[n-1].DoB << "\nAge :" << s[n-1].Age << "\nAddress :" << s[n-1].Address;
for( int x = 0; x < 5; x++ )
{
cout << "\n"<<s[n-1].Course[x];
cout << " grade : "<< s[n-1].grade[x]<<"\n";}
cout << "repeat for another student 'y' or 'n' ?";
cin >> opt1;
}
while(opt1=='y'|| opt1=='Y');
}
void remove()
{
student s[n];
do
{
cout << "enter student roll no to remove data";
cin >> l;
for( int i=l; i < n; i++ )
{
s[l-1].Name=s[l].Name;
s[l-1].DoB= s[l].DoB;
s[l-1].Age=s[l].Age;
s[l-1].Address=s[l].Address;
for(int j=0;j<5;j++)
{
s[l-1].Course[j]=s[l].Course[j];
s[l-1].grade[j]=s[l].grade[j];
}
}
cout<<"Record Removed\n";
n--;
cout << "repeat ? 'y' or 'n' ";
cin >> opt2;
}
while(opt2 == 'y' || opt2 == 'Y');
}
void update()
{
student s[n];
do
{
cout << "enter the roll no of student you want to update data";
cin >> u;
cout << "Roll No. : " << u;
cout << "\nName : ";
cout << s[u-1].Name;
cout << "\nDoB : ";
cout << s[u-1].DoB;
cout << "\nAge : ";
cout << s[u-1].Age;
cout << "\nAddress :";
cout << s[u-1].Address;
cout << "\nCourses and Grades\n";
for( int r=0; r < 5; r++ )
{
cout << s[u-1].Course[r];
cout << "\t"<< s[u-1].grade[r] << endl;
}
cout << "enter name of student ";
cin >> s[u-1].Name;
cout << "enter DoB of student ";
cin >> s[u-1].DoB;
cout << "enter age of student ";
cin >> s[u-1].Age;
cout << "enter address of student ";
cin >> s[u-1].Address;
cout << "enter courses and grades (max 5) \n";
for(int x=0; x < 5; x++ )
{
cout<<"course:";
cin>>s[u-1].Course[x];
cout<<"grade:";
cin>> s[u-1].grade[x];
}
cout << "Roll No. : " << u;
cout << "\nName : ";
cout << s[u-1].Name;
cout << "\nDoB : ";
cout << s[u-1].DoB;
cout << "\nAge : ";
cout << s[u-1].Age;
cout << "\nAddress :";
cout << s[u-1].Address;
cout << "\nCourses and Grades\n";
for( int r = 0; r < 5; r++)
{
cout << s[u-1].Course[r];
cout << "\t"<< s[u-1].grade[r]<<endl;
}
cout << "repeat ? 'y' or 'n' ";
cin >> opt3;
}
while(opt3 == 'y' || opt3 == 'Y');
}
void search()
{
student s[n];
do
{
cout << "enter the roll no of student you want to search data of";
cin >> y;
cout << "Roll No. : " << n << "\nName :" << s[y-1].Name << "\nDoB :" << s[y-1].DoB << "\nAge :" << s[y-1].Age << "\nAddress :" << s[y-1].Address << "\nCourses and Grades\n";
for( int r=0; r < 5; r++ )
{
cout << s[y-1].Course[r];
cout << "\t" << s[y-1].grade[r]<<endl;
}
cout << "repeat ? 'y' or 'n' ";
cin >> opt4;
}
while( opt4 == 'y' || opt4 == 'Y' );
}
The problem you're having is with the scope of your programme.
In the main() function you declare an array, which presumably should be holding all the records. However for every option (function add/remove/update/search) you declare a new one. These arrays are local to those functions and are being "forgotten" after the function is finished.
In order to fix that, you have to pass the original array (the one from main()) to those functions.
The next problem, which is more severe is the fact, that you can't change the size of an array in the runtime! The elements you were accessing in the 3rd option were some random bytes in the memory and this can cause a lot of trouble.
Either create an array with e.g. 100 fields ( student s[100]; ), or even better try using std::vector, which can size you can adjust according to the number of records.
Third thing, remember that formatting code is extremely important. Hopefully it was just a copy-paste problem that made your code look unreadable, but if it's not the case then try to change. Well formatted code is easier to understand and will make it easier for you to debug it.
I'm making a list of Student Objects, and want to iterate over them and output the values they have. I'm not sure why the for loop is being skipped over. Any help/guidance would be appreciated. Here is the loop:
void studentInfo(list<Student> stuList) {
cout << "in studentinfo" << endl;
for (list<Student>::iterator it = stuList.begin(); it != stuList.end(); ++it) {
cout << "in student info loop" << endl;
cout << it->toString();
}
cout << "after loop" << endl;
}
I get the cout messages that are right before and after the loop. Here is the toString() method if you need.
string Student::toString() {
stringstream outString;
outString << "Name: " << name << "\nID: " << id << "\nAge: " << age << endl;
return outString.str();
}
This is how the list is being populated, I'm adding 2 student objects usually when testing:
void addToList(list<Student> stuList) {
string tempName;
int tempID;
int tempAge;
int numStudents;
cout << "How many students will you be entering?\n";
cin >> numStudents;
for (int i = 0; i < numStudents; i++) {
cout << "Enter student name: \n";
cin >> tempName;
cout << "Enter student id: \n";
cin >> tempID;
cout << "Enter student age: \n";
cin >> tempAge;
stuList.push_back(Student(tempName, tempID, tempAge));
}
}