9.18 LAB: Even/odd values in a vector Write a program that reads a list of integers, and outputs whether the list contains all even numbers, odd numbers, or neither. The input begins with an integer indicating the number of integers that follow. Ex: If the input is 5 2 4 6 8 10, the output is: all even Ex: If the input is 5 1 3 5 7 9, the output is: all odd Ex: If the input is 5 1 2 3 4 5, the output is: not even or odd Your program must define and call the following two functions. IsVectorEven returns true if all integers in the array are even and false otherwise. IsVectorOdd returns true if all integers in the array are odd and false otherwise. bool IsVectorEven(vector myVec) bool IsVectorOdd(vector myVec)

The program illustrates the use of functions.

Functions are collections of code blocks that act as one.

The program in C where comments are used to explain each line is as follows:

#include <stdio.h>

#include <stdbool.h>

//This defines the function to determine if all list elements are even

bool checkEven(int inputList[], int numVals){

   //This iterates through the list

   for(int i = 1; i < numVals; i++){

       //If any of the list elements is odd, this returns false

       if(inputList[i] % 2 != 0){

           return false

       }

   }

   //This returns true, if all elements are even

   return true;

   }

//This defines the function to determine if all list elements are odd

bool checkOdd(int inputList[], int numVals){

   //This iterates through the list

   for(int i = 1; i < numVals; i++){

       //If any of the list elements is even, this returns false

       if(inputList[i] % 2 == 0){

           return false;

       }

   }

   //This returns true, if all elements are odd

   return true;

   }

//The main method begins here

int main(){

   //This declares the length of the list

   int n;

   //This gets input for n

   scanf("%d", &n);

   //This declares the list

   int inputList[n];

   //The following loop gets input for the list

   for(int i =0;i<n;i++){

       scanf("%d", &inputList[i]);

   }

   //This checks if all list elements are even

   if(checkEven(inputList,n)){

       printf("All Even");

   }

   //If otherwise, this checks if all list elements are odd

   else if(checkOdd(inputList,n)){

       printf("All Odd");

   }

   //If otherwise, the list elements are neither even, nor odd

   else{

       printf("Not Even or Odd");

   }

}

At the end of the program, the program prints if all list elements are even, odd or neither.

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This program is written in C++. The explanation of code is given below in explanation section.

Explanation:

#include <algorithm>

#include <functional>

#include <iostream>

#include <vector>

using namespace std;

//function to check vector element is even or not  

bool IsEven(int n) {

   return (n % 2) == 0;

}

//function to check vector element is odd or not

bool IsOdd(int n)

{

   if (n%2!=0)// detection of odd value

   {

       return 1;

   }

}

bool IsVectorEven(vector<int> vect)// check even number in vector

{

   auto countEven = count_if(vect.begin(), vect.end(), IsEven);//count total even numbers in vector

   int size= vect.size();//count total number in vector/check vector size  

   if(countEven==size)//all counted even number to size of vector

   {  

       cout<<"\nAll even";//display the message

       //return 1;

   }

   else

   {

       cout<<"\nnot even or odd";//else display the message

      // return 0;

   }

}

bool IsVectorOdd(vector<int> vect)//check odd vector

{

   auto countOdd = count_if(vect.begin(), vect.end(), IsOdd);// count total odd number in vector

   int size= vect.size();// count total number in vector

   if(countOdd==size)// if vector size is equal to vector counted odd number

   {  

       cout<<"\nAll odd";// then vector has all odd number/elements

       //return 1;

   }

   else

   {

       cout<<"\nnot even or odd";//else has odd and even numbers

       //return 0;

   }

}

int main()

{

   vector<int> vec{ 4, 2, 4, 6, 8, 10};//declaration of a vector

   IsVectorEven(vec);//check even number in vector  

   IsVectorOdd(vec);//check odd number in vector.  

}

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