Question

C++ language

Write a program that

1. generates a random integer between 100 and 1000, call the number N

2. reads a file name from the keyboard

3. opens a file for output using the file name from step 2

4. generates N random numbers between 1 and 100 and writes them to the file from step 3

5. closes the file

6. opens the file from steps 3, and 4 for input

7. reads the numbers from the file and finds the largest number in the file.

8. opens the file from step 3 again and counts the number of times the largest number appears in the file

9. displays the largest number and the number of times it appears with appropriate labels.

Answer 1

#include <fstream>

#include <iostream>

#include <cstdlib>

#include <ctime>

using namespace std;

int main() {

int seedVal=0;

//t is a 'time_t' type variable

time_t t;

seedVal = (unsigned) time (&t);

srand(seedVal);

  

//defines an input stream for the data file

ifstream dataIn;

  

//Defines an output stream for the data file

ofstream dataOut;

string filename;

//Declaring variable

int max=-999;

int random,count=0;

  

//Generate the random number

int N=rand()%(901) + 100;

  

//Getting the filename entered by the user

cout<<"Enter a filename:";

cin>>filename;

  

//Opening the input file

dataOut.open(filename.c_str());

  

//Generate N random number

for(int i=1;i<=N;i++)

{

random=rand()%(100) + 1;

//Writing to the output file

dataOut<<random<<endl;

}

  

//closing the output file

dataOut.close();

  

//creating and Opening the output file

dataIn.open(filename.c_str());

for(int i=1;i<=N;i++)

{

dataIn>>random;

if(max<random)

{

max=random;

}

}

  

//Closing the intput file

dataIn.close();

  

cout<<"The Largest number in the file is :"<<max<<endl;

//creating and Opening the output file

dataIn.open(filename.c_str());

  

for(int i=1;i<=N;i++)

{

dataIn>>random;

if(random==max)

{

count++;

}

}

dataIn.close();

//Displaying the output

cout<<"No of times largest number appears in the file is :"<<count<<endl;

  

return 0;

}

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Output:

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