A correlation is a consistent relationship between two or more variables. It relates to our tendency to draw causation from mere correlation.
Answer:
/*C++ program that prompts user to enter the name of input file(input.txt in this example) and print the sum of the values in the file to console. If file dosnot exist, then close the program */
//header files
#include <fstream>
#include<string>
#include <iostream>
#include <cstdlib> //needed for exit function
using namespace std;
//function prototype
int fileSum(string filename);
int main()
{
string filename;
cout << "Enter the name of the input file: ";
cin >> filename;
cout << "Sum: " << fileSum(filename) << endl;
system("pause");
return 0;
}
/*The function fileSum that takes the string filename and
count the sum of the values and returns the sum of the values*/
int fileSum(string filename)
{
//Create a ifstream object
ifstream fin;
//Open a file
fin.open(filename);
//Initialize sum to zero
int sum=0;
//Check if file exist
if(!fin)
{
cout<<"File does not exist ."<<endl;
system("pause");
exit(1);
}
else
{
int value;
//read file until end of file exist
while(fin>>value)
{
sum+=value;
}
}
return sum;
}//end of the fileSum
Explanation:
This is a C++ program that prompts user to enter the name of input file(input.txt in this example) and print the sum of the values in the file to console. If file dosnot exist, then close the program.
Check attachment for sample output screenshot.
The 3 files you need to have for a successful mail merge are:
- An Excel spreadsheet works
- Outlook Contact List.
- Apple Contacts List or Text file, etc.
<h3>What is Mail Merge?</h3>
This is known to be the act of carrying out a Mail Merge and it is one where a person will need to use a Word document and a recipient list, that is an Excel workbook.
Files needed are:
- Text file,
- address files, etc.
The 3 files you need to have for a successful mail merge are:
An Excel spreadsheet worksOutlook Contact List.
Apple Contacts List or Text file, etc.
Learn more about mail merge from
brainly.com/question/20904639
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