Question

Explain the difference between array and structure based on their usage in C++ programming.

Declare a structure called studentScore which contains name of student, registration number of students, course code and marks.

Declare structure variable named studentCS680 based on the structure in (b) to store fifty (50) students’ data.

Write a program that prompts a user to enter data for 50 students in a structure variable declared in (b) and calculate the average mark.

Answer 1

a) an array is a contiguos block of memory which is allocated during compile time to store data belonging to a particular datatype.Whereas the structure is defined as a template which can used to encapsulate related data into one object.

for example int a[10]; //this is an array

whereas struct student

{

string name;

string rollId;

}

this is a structure of student which acts as a template.

b)

struct StudentScore

{

string name;

string regNo;

string courseCode;

float marks;

};

c)StudentScore studentCS680[50];

d)

void input(){

cout<<"Enter data for 50 students";

float avg = 0.0;

for(int i = 0;i < 50;++i)

{

cout<<"\nName : ";

getline(cin,studentCS680[i].name);

cout<<"\nReg No: ";

getline(cin,studentCS680[i].regNo);

cout<<"\nCourseCode : ";

getline(cin,studentCS680[i].courseCode);

cout<<"\nMarks : ";

cin >> studentCS680[i].marks;

avg += studentCS680[i].marks;

}

avg = avg / 50;

cout<<"\nAverage "<<avg;

}