Answered: You have to read a file with 10…

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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Question

You have to read a file with 10 integers into an array named read_arr. Assume the file has been associated with the ifstream fin and num is a variable of integer data type. What will work?

Group of answer choices

(a)

for(int i=0;i<10;++i)

read_arr[i]=(fin>>num);

(b)

for(int i=0;i<10;++i)

{

fin>>num;

read_arr[i]=num;

}

(c)

int i=0;

while(fin>>num)

{

read_arr[i]=num;

++i;

}

Both (b) and (c)

=====================

Which of the following is a correct struct declaration?

Group of answer choices

None of these

struct Data

{

int id;

float price;

}

Data struct

{

int id;

float price;

}

struct

{

int id;

float price;

} Data

======================

Consider the following code fragment.

struct Employer
{

string name;
double salary;
};
void update (Employer emp)
{

emp.salary += 1000.00;
};

int main()
{
Employer e;
e.name = "Test"; e.salary = 1000;
update(e);
cout << e.salary;
return 0;
}

What is the output?

Group of answer choices

1000.00

2000.00

Test

Compilation error, emp.salary is not defined, we cannot add 1000.00 to it

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