Question

Topics c++

Do While loops

cin.ignore

Description

Redo the last assignment with the following modifications:

1. When the program asks the user to enter a student name, the user will enter the full name (e.g. John Smith). Make changes to the program to accommodate that.

2. When the program asks the user to enter the test score, the user will enter the test score as before. However, make changes to the program so that it will check that the score entered is within the range of 0 to 100. If the score entered is outside that range, the program will ask the user to enter the score again. The program will do that repeatedly until the user enters the score in the required range.

Requirements

Do this assignment using a While statement for the loop and a Do While statement for student score input validation.

Implementation Notes

When using a mixture of cin and getline in a program, follow each cin with a cin.ignore ( ).

To force the user to enter the score in the required range, use a Do While loop.

Testing

For turning in the assignment, perform the test run below using the input shown.

Test Run (User input is shown in bold).

Enter Student Name

Alan Adam

Enter Student Score <0-100>

101

Enter Student Score <0-100>

-1

Enter Student Score <0-100>

75

Alan Adam 75 C

Enter Student Name

Bob Boulder

Enter Student Score:

90

Bob Boulder 90 A

Enter Student Name

Cathy Cameron

Enter Student Score

80

Cathy Cameron 80 B

Enter Student Name

Dave Davenport

Enter Student Score:

55

Dave Davenport 55 F

Enter Student Name

Eve Einstein

Enter Student Score

85

Eve Einstein 85 B

Enter Student Name

//

Summary Report

Total Students count 5

A student count 1

B student count: 2

C student count 1

D student 0

F students 1

Sample Code

Note that the sample code below uses a mixture of cin and getline. Whenever such a mixture is used, make sure that every cin is followed by cin.ignore() as done in the sample code.

Also note that in the sample code below, a Do While loop is used to ensure that the user enters a valid score. Often, a Do While statement is used in this fashion for input validation.

int score;

string name;

//Initial setup

cout << "Enter Student name" << endl;

getline (cin, name);

//Test

while (name != "//")

{

       //validate score input

do

{

              cout << "Enter Student Score <0-100>" << endl;

              cin >> score;

              cin.ignore ( );

} while (score < 0 || score > 100);

//compute grade and display it

//Update setup

out << "Enter Student name" << endl;

getline (cin, name);

}

//display summary result

Answer 1

Program:

#include <iostream>

using namespace std;

int main() {

int count = 0,score, AGRADE = 0,BGRADE = 0,CGRADE = 0,GRADE = 0,DGRADE = 0,FGRADE = 0; // variable declaration

string name; // variable declaration

cout << "Enter Student name" << endl;

getline (cin, name); // Accept the name of the student

while (name != "//") // Check name as //

{

count++; // increment count

do

{

cout << "Enter Student Score <0-100>" << endl;

cin >> score; // Accept the score

cin.ignore ( ); // To ignore enter

} while (score < 0 || score > 100); // It check number between 0-100

/* Check the score and give corresponding grade*/

if(score>=90){

cout<<name<<" "<<score<<" "<<" A" << endl;

AGRADE++;

}

if(score>=80&&score<90){

cout<<name<<" "<<score<<" "<<" B" << endl;

BGRADE++;

}

if(score>=70&&score<80){

cout<<name<<" "<<score<<" "<<" C" << endl;

CGRADE++;

}

if(score>=60&&score<70){

cout<<name<<" "<<score<<" "<<" D" << endl;

DGRADE++;

}

if(score<60){

cout<<name<<" "<<score<<" "<<" F" << endl;

FGRADE++;

}

cout << "Enter Student name" << endl;

getline (cin, name); // Accept the name of the student

}

/* Print the reports according to the input*/

cout<<"Summary Report"<<endl;

cout<<"Total Students count "<<count<<endl;

cout<<"A student count: "<<AGRADE<<endl;

cout<<"B student count: "<<BGRADE<<endl;

cout<<"C student count: "<<CGRADE<<endl;

cout<<"D student count: "<<DGRADE<<endl;

cout<<"F student count: "<<FGRADE<<endl;

return 0;

}

Output: