Consider the following code, which is part of a program that maintains student records. struct record { }; int ID; char last_name[10]; char first_name[10]; int score; /* This computes and returns the exam average for an array of student record */ double compute_average (struct record [] rec, int n) { } int i; int total = 0; for(i=0; i

Consider the following code, which is part of a program that maintains student records. struct record { }; int ID; char last_name[10]; char first_name[10]; int score; /* This computes and returns the exam average for an array of student record */ double compute_average (struct record [] rec, int n) { } int i; int total = 0; for(i=0; i

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Array

The simplest way to start thinking about an array is as a collection, or a set of elements. In programming, these elements may be constants, variables, functions and pointers.

Question

Consider the following code, which is part of a program that maintains student records.
struct record
{
};
int ID;
char last_name[10];
char first_name[10];
int score;
/* This computes and returns the exam average for an array of student record */
double compute_average (struct record [] rec, int n)
{
}
int i;
int total = 0;
for(i=0; i<n; i++)
{
statement /* compute total exam score */
}
return (double) total/n;
Which of the following statements in place of statement will correctly calculate the total of student's score in the array?
O total + rec.score;
O total += rec.score[i];
O total += rec[i].score;
O total += rec[i].score[i];

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