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ABSOLUTE C++

Absolute C++

Authors:
Walter Savitch ,kenrick Mock
Exercise:
Programming Projects
Chapter:
Streams And File Io
Edition:
5
ISBN:
9780132846813
Question:
1

 

Question

Write a program that will search a file of numbers of type int and write the largest and the smallest numbers to the screen. The file contains nothing but numbers of type int separated by blanks or line breaks.


Answer

Complete Program:

#include <iostream>
#include <string>
#include <fstream>
#include <cstdlib> 
#include <climits>
using namespace std;

int main()
{
	string fileName = "";
	int number;
	int largestNumber = INT_MIN;
	int smallestNumber = INT_MAX;	

	cout << "Enter the file name: ";
	cin >> fileName;

	ifstream infile;
	infile.open(fileName);

	if (infile.fail())
	{
		cout << fileName << " file cannot be opened!" << endl;
		exit(1);
	}

	while (infile >> number)
	{
		if (number > largestNumber)
			largestNumber = number;

		if (number < smallestNumber)
			smallestNumber = number;
	}

	cout << "The largest number in the file:  " << largestNumber << endl;
	cout << "The smallest number in the file: " << smallestNumber << endl;	

	return 0;
}

Input file: indata.txt

Output on console:

0 0

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