Develop a C++ function with following function prototype: double fileAvg(string fname); The function accepts the name of file as input and returns the average of the numbers in that file (the file is assumed to contain numbers only). Write a C++ main program that prompts the user to enter a file name that contains a set of numbers. The main program should calculate the average of the numbers in the file using the function fileAvg and display the returned value to the user.
Develop a C++ function with following function prototype: double fileAvg(string fname); The function accepts the name of file as input and returns the average of the numbers in that file (the file is assumed to contain numbers only). Write a C++ main program that prompts the user to enter a file name that contains a set of numbers. The main program should calculate the average of the numbers in the file using the function fileAvg and display the returned value to the user.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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num 2 in c++
![Develop a C++ function with following function prototype:
double fileAvg(string fname);
The function accepts the name of file as input and returns the average of the
numbers in that file (the file is assumed to contain numbers only). Write a
C++ main program that prompts the user to enter a file name that contains a
set of numbers. The main program should calculate the average of the
numbers in the file using the function fileAvg and display the returned value
to the user.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fec6e149b-a033-4a5b-8a67-e69cf965c408%2F29a44000-a5d7-4777-a6cd-87a5ba827e16%2F3h0h5dg.jpeg&w=3840&q=75)
Transcribed Image Text:Develop a C++ function with following function prototype:
double fileAvg(string fname);
The function accepts the name of file as input and returns the average of the
numbers in that file (the file is assumed to contain numbers only). Write a
C++ main program that prompts the user to enter a file name that contains a
set of numbers. The main program should calculate the average of the
numbers in the file using the function fileAvg and display the returned value
to the user.
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
Step 1
Program code:
//include the required header files
#include <iostream>
#include <fstream>
using namespace std;
//definea function to find average
double fileAvg(string fname)
{
//declare the required variables
int sum = 0;
int counter = 0;
int x;
// Open the input file using ifstream
ifstream inFile;
inFile.open(fname.c_str());
//if true
if (!inFile)
{
//print the statement
cout << "Unable to open file";
// terminate with error
exit(1);
}
// Read the numbers one by one and keep overwriting x with the last read number
while (inFile >> x)
{
// Add the last read number to "sum"
sum = sum + x;
// Increase counter by 1
counter++;
}
// Close the file
inFile.close();
// Return sum/counter which is the same as average of all the numbers that were read
return (double) sum/counter;
}
//define main
int main()
{
//declare variable for file name
string fname;
//propt the user to enter the file name
cout << "Name your file: ";
//scan for input
cin>>fname;
// Print the value returned by calling the function fileAvg with input fname
cout <<"Average: "<<fileAvg(fname) << endl;
}
Step 2
Program code #1:
Step 3
Program code #2:
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