String input prolem

[Ltp]

While I a run this code without using loop, it works perfect. But using loop, there is a problem. Can anyone fix this?
Thanks in advance.

With loop(need loop to take several student's data):

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

class std_info{
public:
	string name;
	string id;
	int credit;
	float cgpa;
};

int main()
{
    std_info student;
    int option;

    do{
        cin>>option;
        cout<<"Enter student name: ";
        getline(cin, student.name);

        cout<<"Enter id: ";
        getline(cin, student.id);

        cout<<"Enter credit: ";
        cin>>student.credit;

        cout<<"Entmer cgpa: ";
        cin>>student.cgpa;

        cout<<"Nmae: "<<student.name<<endl;
        cout<<"Id: "<<student.id<<endl;
        cout<<"Credit: "<<student.credit<<endl;
        cout<<"Cgpa: "<<student.cgpa<<endl;


    }while(option == 1);

	return 0;
}

Without loop(take just one student's data):

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

class std_info{
public:
	string name;
	string id;
	int credit;
	float cgpa;
};

int main()
{
    std_info student;

    cout<<"Enter student name: ";
    getline(cin, student.name);

    cout<<"Enter id: ";
    getline(cin, student.id);

    cout<<"Enter credit: ";
    cin>>student.credit;

    cout<<"Entmer cgpa: ";
    cin>>student.cgpa;

    cout<<"Nmae: "<<student.name<<endl;
    cout<<"Id: "<<student.id<<endl;
    cout<<"Credit: "<<student.credit<<endl;
    cout<<"Cgpa: "<<student.cgpa<<endl;
    
    return 0;
}

[nvrmnd]

that loop should work ? what is the exact problem ?

[Ltp]

The Problem is, without loop, it displays:

Enter student name:
Enter Id:
Enter credit:
Enter CGPA:

But without, it displays:

Enter student name: Enter Id:
Enter credit:
Enter CGPA:

[Ltp]

But I need to use loop.

[nvrmnd]

add cin.ignore() after cin >> option;

[Ltp]

Thanks a lot.. :)