Answer to Question #321343 in C++ for yow

Question

Find the error(s) and show how to correct it(them) in each of the following.

a.

File

pets.dat

that stores its id, name, age and owner

of the pet is referred to by ofstream object

petfile

.

petfile>>pet_id>>pet_name>>pet_age>>pet_owner;

b.

The following statement should create an ifstream object

salesfile

that refers to the file

weeklysales.dat

that contains data about the id the

salesperson, total sales generated, and the

week number, read the data from the file and display it on the console output.

ifstream salesfile(“weeklysales.dat”);

int id,wk;

float sales;

salesfile>>id>>wk>>sales;

while (!salesfile.eof()){

cout<<id<<”\t”<<sales<<”\t”<<wk<<”\n”;

salesfile<<id<<wk<<sales;

}

Answer 1

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

int main() {
	// Use "" instead of “”. “” are not valid
	ifstream salesfile("weeklysales.dat");
	int id,wk;
	float sales;
	while (!salesfile.eof()){
		// Next line should be inside while loop. Because you want to read every line, not first line n times, i guess.
		salesfile>>id>>wk>>sales;
		// Same here. Use "" instead of “”.
		cout<<id<<"\t"<<sales<<"\t"<<wk<<"\n";
		// Why did you put the following line here? You can't write to a istream and you don't have to return your data to a file after use. Next line is useless.
		//salesfile<<id<<wk<<sales;
	}
}