Question

please write program in C++

Write a function called productEven, that takes as its parameter an input file. The function should read two integers and calculate the total product of only even numbers between them. Return the answer to the calling function. please write the program in C++

Answer 1

#include <bits/stdc++.h>

using namespace std;

long long int productEven(string name)

{

ifstream fi;

fi.open(name);

long long int x,y;

fi>>x>>y;

long long int answer=1 ;

if(x<=y)

{

for(int i=x;i<=y;i++)

{

if(i%2==0)answer*=i;

}

}

else

{

for(int i=y;i<=x;i++)

{

if(i%2==0)answer*=i;

}

}

return answer;

}

int main() {

std::cout << productEven("input.txt") << std::endl;

  return 0;

}