getline(cin,string[array])

[LoOpz]

Hi!

I have been learning the C++ programming language thanks to this website and I am creating my own examples or exercises just to learn, so the code may be kind of lame, but I'm having a problem with the getline() function. I designed a program where the user can insert information about students names and their grades.

Here is the source code:

#include <iostream>
#include <string>
using namespace std;

class StuDB{
      string *student_name;
      int **student_grade,am_students,am_grades;
      public:
             StuDB (int,int);
             ~StuDB();
             void info_in()
             {
                  for(int a=0;a<am_students;a++)
                  {
                          cout<<"Insert Student "<<a+1<<" name-> ";
                          getline (cin,student_name[a]);
                          cout<<student_name[a]<<" grades: "<<endl;
                          for(int b=0;b<am_grades;b++)
                          {                                        
                                  cout<<"Grade "<<b+1<<"-> ";
                                  cin>>student_grade[a][b];
                                  }
                   }
              }
             void info_show()
             {
                  for(int c=0;c<am_students;c++)
                  {
                   cout<<"\n"<<student_name[c]<<" grades: ";
                          for(int d=0;d<am_grades;d++)
                          {
                              cout<<student_grade[c][d]<<" . ";
                              }
                    }
              }    
};

StuDB::StuDB(int u_s,int u_g)
{
 am_students = u_s;
 am_grades = u_g;
 student_name = new string[u_s];
 student_grade = new int*[u_s];
 for(int i=0;i<u_s;i++)
 {student_grade[i]=new int[u_g];}
}
 
StuDB::~StuDB()
{
 delete[] student_name;
 delete[] student_grade;
 }
             
int main()
{
    int user_students,user_grades;
    cout<<"\t-Student DataBase-"<<endl;
    cout<<"How many students are being registered>";
    cin>>user_students;
    cout<<"How many grades per student>";
    cin>>user_grades;
    StuDB NewLand_school (user_students,user_grades);
    cout<<"\n\t***Insert Information***\n"<<endl;
    NewLand_school.info_in();
    cout<<"\n\t***Report***\n";
    NewLand_school.info_show();
    cout<<"\n";
    system("pause");
    return 0;
}

I know that cin>> stops reading as soon it founds a space character so I used the getline() function to retrieve both first and last name.

The problem is that when I run the program, I can't insert the student name.

The output should be something like this:

      -Student Database-
How many students are being registered>2
How many grades per student>4

     ***Insert Information***

Insert Student 1 name-> Manuel Perez
Manuel Perez grades:
Grade 1-> 95
Grade 2-> 85 
....... etc.

But instead, it shows:

   -Student Database-
How many students are being registered>2
How many grades per student>4

     ***Insert Information***

Insert Student 1 name-> grades:
Grade 1->

I had the same problem on other similar exercises and i searched the internet for help but nothing.

Any help would be appreciated!

By the way, the last chapter I read was Classes(I)

And sorry for writing too much lol.

[3hM2Nwbp]

You may need to ignore a newline character before calling cin.getline

std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');

Try dropping that in before you start taking names.

[LoOpz]

Thanks, ill use it.