Question

(write a program that get the numbers from user and search the file numbers.text for that value. in C++)
numbers.txt:
10
23
43
5
12
23
9
8
10
1
16
9

you must to have the exact output:

Enter a number: 10
10 last appears in the file at position 9
Enter a number: 29
29 does not appear in the file
Enter a number: 9
9 last appears in the file at position 12
Enter a number:

Answer 1

#include <iostream>

#include <fstream>

using namespace std;

int main()

{

fstream inputFile;

int count, number,target,found=0;

count = 0;

//opening the file

inputFile.open("numbers.txt");

if (inputFile.fail()){

cout << "File open error....";

return 0;

}

//reading the number

cout<<"Enter number : ";

cin>>target;

while (!inputFile.eof()){

count++;

inputFile >> number;

inputFile.ignore();

//checking if this is the number

if(number==target){

found=count;

}

}

//printing the details

if(found!=-1)

cout<<target<<" last appears in the file at position "<<found<<endl;

else

cout<<target<<" does not appear in the file";

inputFile.close();

return 0;

}

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