Authors:
Walter Savitch ,julia Lobur
Chapter:
I/o Streams As An Introduction To Objects And Classes
Exercise:
Programming Projects
Question:1 | ISBN:9780321531346 | Edition: 7
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. If this is being done as a class assignment, obtain the file name from your instructor.
Answer
#include <iostream>
#include <string>
#include <fstream>
using namespace std;
int main()
{
string inputFile;
ifstream inFile;
int num;
int largeNum;
int smallNum;
cout << "Enter a input file name: ";
cin >> inputFile;
inFile.open(inputFile);
if(inFile.fail())
{
cout << inputFile << " File is not found. Give correct file name." << endl;
system("pause");
exit(1);
}
if(inFile >> num)
{
largeNum = num;
smallNum = num;
while(inFile >> num)
{
if(num > largeNum)
largeNum = num;
if(num < smallNum)
smallNum = num;
}
cout << "The largest number: " << largeNum << endl;
cout << "The smallest number: "<< smallNum << endl;
}
else
cout << "The file contains no numbers that is the file is empty." << endl;
system("pause");
return 0;
}
Input file data(NumbersFile.txt):
1 2 3 4 5 6
10 20 30 40 50
Output of the program:
