How to reiterate the loop

[jamiprogrammer]

Hello everyone,

Before I posted here I did try to find help on the topic to no avail. I am trying to reiterate the if-else loop where my code asks for students 2, 3 and so forth. As you can see when you run the code it only asks for student 1 and continues on. I need a total of 10 students. Perhaps I don't understand the logic or how to being my problem solving

#include <iostream> 
#include <string> 
#include <cmath> 
#include <iomanip>



using namespace std;



int main()

{

              // using array to set number of recods, student names and GPA 
              
              const  int ARRAY_SIZE = 10; // number of records generated by Array

              int record[ARRAY_SIZE]; // number records to be generated

              string studentTotal [ARRAY_SIZE]; // number of students generated

              double studentGPA[ARRAY_SIZE]; // number of gpa generated 
              
              string lastName;

              string firstName;

 

              // Set floating point values to two decimal places

              cout << setiosflags(ios::fixed);

              cout << setiosflags(ios::showpoint);

              cout << setprecision(2);

 

 

              // gather student names and GPAs
              
              cout << " welcome to GPA Sheet " << endl;
              
              cout << "======================" << endl;

              for (int count = 0; count < ARRAY_SIZE; count++)
              

              {

                 if (count == 0){

                      cout << "Student " << count + 1 <<endl;

                       cout << "Enter in the students  name, starting with the last name  : ";

                      getline (cin, studentTotal[count]);

                        cout << "Student GPA: ";

                         cin >> studentGPA[count];

                             } else

                             {

                                             cout << "Enter in the students name, starting with the last name : ";

                                                                                  cin.ignore();

                                                                                  getline (cin, studentTotal[count]);

                                                                                  cout << " student GPA: ";

                                                                                  cin >> studentGPA[count];

                             }

 

              }

             cout << "====================" << endl;

              //print column names

              cout << setfill(' ') << setw(25) << left << "Student Name" << setw(5) << right << "GPA" << endl;

 

              // set letter case in studentNames array

              for (int count = 0; count < ARRAY_SIZE; count++)

              {

                             // separate first and last names

                             string::size_type commaPos = studentTotal[count].find(",");  //find ","

                             lastName = studentTotal[count].substr(0, commaPos);  // select last name

                             firstName = studentTotal[count].substr(commaPos + 1);              // select first name

                             if (firstName[0] == ' ') firstName.erase(0, 1);     // remove blank space between "," and first letter of first name

 

                             // set all letters in first name to lower case, and then set first letter to upper case

                             for (int x = 0; x < firstName.length(); x++)

                             {

                                           firstName[x] = tolower(firstName[x]);

                             }

                             firstName[0] = toupper(firstName[0]);

 

                             // set all letters in last name to lower case, and then set first letter to upper case

                             for (int x = 0; x < lastName.length(); x++)

                             {

                                           lastName[x] = tolower(lastName[x]);

                             }

                             lastName[0] = toupper(lastName[0]);

 

                             // set original studentName variable to proper case formatting

                             studentTotal[count] = lastName + ", " + firstName;

 

                             // print student record

                             cout << setfill(' ') << setw(25) << left << studentTotal[count] << setw(5) << right << studentGPA[count] << endl;

 

              }

 

              //system("pause");

 

              return 0;

}
 

[salem c]

Please edit your post.
https://www.cplusplus.com/articles/jEywvCM9/

[keskiverto]

First, please use code tags. See http://www.cplusplus.com/articles/jEywvCM9/

Is this the loop that you talk about:

for ( int count = 0; count < ARRAY_SIZE; count++ )
{
  if (count == 0) {
    cout << "Student " << count + 1 <<endl;
    cout << "Enter in the students name, starting with the last name : ";
    getline (cin, studentTotal[count]);
    cout << "Student GPA: ";
    cin >> studentGPA[count];
  } else {
    cout << "Enter in the students name, starting with the last name : ";
    cin.ignore();
    getline (cin, studentTotal[count]);
    cout << " student GPA: ";
    cin >> studentGPA[count];
 }
}

You have repetition there. Something that is done on both branches of the if..else. We can take it out:

for ( int count = 0; count < ARRAY_SIZE; count++ )
{
  if (count == 0) {
    cout << "Student " << count + 1 <<endl;
  } else {
    cin.ignore();
  }

  cout << "Enter in the students name, starting with the last name : ";
  getline (cin, studentTotal[count]);
  cout << " student GPA: ";
  cin >> studentGPA[count];
}

Why do you have line 4 only for the first student?

[jamiprogrammer]

So this where I was mistaken because if-else is a statement not a loop. What I wanted to do was have the program ask for student 1, 2 and so forth. Judging by what you just asked me I need to have an if-else from all the students all the way up to 10. Could I just turn this is into a do-while loop?

[keskiverto]

Why if..else at all?

for ( int count = 0; count < ARRAY_SIZE; count++ )
{
  cout << "Student " << count + 1 <<endl;
  cin.ignore();
  cout << "Enter in the students name, starting with the last name : ";
  getline (cin, studentTotal[count]);
  cout << " student GPA: ";
  cin >> studentGPA[count];
}

[jamiprogrammer]

So the problem is, it doesnt ask for student 2. While it works, it doesn't ask for student 2, like it does the first.

this is what I get when its ran

Student 1
Enter in the student's name, starting with the last name :


After inputting the first student's info I want it run again but ask

student 2
Enter in the student's name . starting with the last name :

and continue to ask up to 10 and then stop

so the loop does work, my apologies for not being clear, English is my 3 language.

[dhayden]

Please

don't

double



or



quadruple

space

your

code



it



makes it

hard

to

read.

[bevillmen23]

Just move

cout << "Student " << count + 1 <<endl;

to outside the if statement. That way it will run every time.

/
for ( int count = 0; count < ARRAY_SIZE; count++ ) {
  
   cout << "Student " << count + 1 <<endl;

  if (count == 0) {
    cout << "Enter in the students name, starting with the last name : ";
    getline (cin, studentTotal[count]);
    cout << "Student GPA: ";
    cin >> studentGPA[count];
  } else {
    cout << "Enter in the students name, starting with the last name : ";
    cin.ignore();
    getline (cin, studentTotal[count]);
    cout << " student GPA: ";
    cin >> studentGPA[count];
 }
}

[jamiprogrammer]

thanks @bevilman gave it a try and it works, Interesting.. Thank you so much.