1. Program that inputs ten integers in an array and counts all prime numbers entered by the user. The program finally displays total number of primes in array.

Chapter 7: 

Arrays

Programming Exercise

Problem # 1:

Write a program that inputs ten integers in an array and counts all prime numbers entered by the user. The program finally displays total number of primes in array.

Solution:

#include<iostream>
#include<conio.h>
using namespace std;
int main ()
{
    int arr[10], i, p=0, c, prime=0;
    for(i=0;i<10;i++)
    {
        cout<<"Enter an integer:";
        cin>>arr[i];
    }
    cout<<"The prime numbers are:\n";
    for(i=0;i<10;i++)
    {
        if(arr[i]>1)
        {
            p=1;
            for(c=2;c<arr[i];c++)
            {
                if(arr[i]%c==0)
                {
                    p=0;
                    break;
                }
            }
        }
        if(p==1)
        {
        cout<<arr[i]<<" is a prime number.\n";
        prime++;
        }
    }
        cout<<"total prime numbers entered by the user are: "<<prime;  
}

Output:

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