Question

write a programm to find the greatest of 3 number and also check the largest number is prime or not

Answer 1

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#include <iostream>

using namespace std;

int main()
{  int greatest;
    int a,b,c;
    int flag=0;
    cout<<"enter a,b,c";
    cin>>a;
    cin>>b;
    cin>>c;
    if(a>b&&a>c)
    {
           greatest=a;
            cout<<greatest;
        
    }
    else if(b>a&&b>c)
    {
        greatest=b;
         cout<<greatest;
    }
    else
    {
        greatest=c;
         cout<<greatest;
    }
    if(greatest==2)
    {
        cout<<"greatest is prime";
    }

    for(int i=3;i<greatest;i++)
    {
        if(greatest%i==0)
        {
            flag=1;
        }
    }
    if(flag==1)
    {
        cout<<" not prime ";
    }
    else
    {
        cout<<" prime ";
    }
    
    return 0;
}

Answer 2

#include<stdio.h>

main()

{

int num1,num2,num3,large;

printf("Enter the  first number:");

scanf("%d",&num1);

printf("Enter the second number:");

scanf("%d",num2);

printf("Enter the third number:");

scanf("%d",num3);

large=num1>num2?((num1>num3)?num1:num3):((num2>num3)?num2:num3);

printf("\n The largest number is :%d",large);

    if(large%2!=0)

printf("\n prime number");

    else

printf("\n non-prime number);

return 0;

}