C Help Filestream Write a program that reads the values from

C++ Help: Filestream

Write a program that reads the values from a file and writes the sum of all multiples of 2
or 5 into another file. Your program must contain separate functions for reading and writing a file.

Please explain your code-Will give a thumbs up. Thanks!

Solution

num.txt (Save this file inside D:Drive .Then the path of the file pointing to this file is D:\\\ um.txt )

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

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CPP code

#include <iostream>
#include <fstream>
using namespace std;

//Declaring Global variable
int sum=0;

//Function declarations
void readFromFile();
void writeToFile();

/* Function implementation which will
* read the numbers from the file and calculates the sum of
* the numbers which are multiples of 2 or 5
*/
void readFromFile()
{
int number;  

//fileInput reference
ifstream dataIn;
      
//Opening input file
dataIn.open(\"D:\\\ um.txt\");  

while(dataIn>>number)
{
   if(number%2==0 || number%5==0)
   {
       sum+=number;
   }
}

//closing the input stream
dataIn.close();  

}

/* Function implementation which will
* display the sum into another text file
*/
void writeToFile()
{
//fileoutput reference
ofstream myfile;
  
//Opening the file
myfile.open (\"D:\\\ um1.txt\");

//Writing the contents to the file
myfile <<\"The Sum of Multiples of 2 or 5 is :\"<<sum<<endl;

//closing the output stream.
myfile.close();
      
}
int main()
{
//Calling the function which will read the file  
readFromFile();

//Calling the function which will write the output to file
writeToFile();

  
return 0;
}

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output:

num1.txt (We will get this file in D Drive.As we specified the path D:\\\ um1.txt)

The Sum of Multiples of 2 or 5 is :130

____________________________________Thank You