Answer / makthar basha

Write a program that takes a 3 digit number n and finds out
whether
the number 2^n + 1 is prime, or if it is not prime find out
its
factors.

Answer / sreenu

please send source code for for a program that takes a 3
digit number n and finds out
whether
the number 2^n + 1 is prime, or if it is not prime find out
its
factors in c.

Answer / salma

i also face sthe same question please send me the full code

Answer / sreejesh1987

//Sorry,this code is wrong.
//I'm not removing this,because it may serve some other purpose.

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,n,x,flag=0,d;
clrscr();
printf("\tPRIME CHECK\n");
printf("Enter a 3digit no:");
scanf("%d",&n);

if((n/100>0)&&(n/100<10))
printf("\nNumber is of 3 Digits");
else
printf("\nNot a 3 digit number");

for(j=2;j<n,n%j!=0;j++)
if(n-1==j)
{
printf("\n\t%d is a prime",n);

flag=1;

d=n-1;
while(d%2==0)
d=d/2;

if(d==1)
printf("\nNumber%d is in 2^n+1 format",n);
else
printf("\nNumber%d is not in 2^n+1 format",n);
}

if(!flag)
{
printf("\nNumber %d is not a prime",n);
printf("\nIts factors are:\n\t");

x=2;
while(n!=1)
{
while(n%x==0)
{
n=n/x;
printf("%d ",x);
}
x++;
}
}
getch();
}

Answer / amit

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int n, i, m=0, flag=0;
cout << "Enter the power of 2 ";
cin >> n;
m=pow(2,n)+1;
for(i = 2; i <= m; i++)
{
if(m % i == 0)
{
cout<<"Number is not Prime."<<endl;
flag=1;
break;
}
}
if (flag==0)
cout << "Number is Prime."<<endl;
return 0;
}

write a program to calculate the radius for a quadratic equation use modular programming(function abitraction)hint use quadratic function

1 Answers   ICAN, Jomo Kenyatta University,

3. Program to find the Sum of give series. a. (1)+(1+2)+(1+2+3)+(1+2+3+4)+……………………………….. b. 1/1+1/9+1/25+1/49+……………...

0 Answers  

what is the best algorithm to sort out unique words from a list of more than 10 million words(1 crore+)? we need the best technique in the terms of execution time.

9 Answers   TCS,

what is the diffrence between ++x , x++ pleaaaaase ???

7 Answers  

What output does this program generate as shown? Why? class A { A() { cout << "A::A()" << endl; } ~A() { cout << "A::~A()" << endl; throw "A::exception"; } }; class B { B() { cout << "B::B()" << endl; throw "B::exception"; } ~B() { cout << "B::~B()"; } }; int main(int, char**) { try { cout << "Entering try...catch block" << endl; A objectA; B objectB; cout << "Exiting try...catch block" << endl; } catch (char* ex) { cout << ex << endl; } return 0; }

0 Answers  

Write a &#61521;(n) algorithm that sorts n distinct integers, ranging in size between 1 and kn inclusive, where k is a constant positive integer. (Hint: Use a kn-element array.)

0 Answers  

Display Pattern: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 &#8230;

2 Answers   Mind Tree,

1.program to add any two objects using operator overloading 2.program to add any two objects using constructors 3.program to add any two objects using binary operator 4.program to add any two objects using unary operator

2 Answers   IBM,

Create a program to read two random data set in two files named data1.txt and data2.txt manifold contains integer numbers, whereas data2.txt file contains the float type numbers. Simpanlahmasing each into 2 pieces of data that is an array of type integer array and an array of type float, then calculate the average numbers in the second array.

0 Answers  

Write A C++ Program To Input A Number Between 20 To 99 And Display Its Numbername?

3 Answers   TCS,

1. Write a program that performs the following. The user inputs a number and then enters a series of numbers from 1 to that number. Your program should determine which number (or numbers) is missing or duplicated in the series, if any. For example, if the user entered 5 as the initial number and then entered the following sequences, the results should be as shown. Input Sequence Output ---------------------- --------------- 1 2 3 4 5 Nothing bad However, if 7 were the high number, the user would see the results on the right for the following number entries: Input Sequence Output ---------------------- --------------- 1 3 2 4 5 Missing 6 Missing 7 And if 10 were the high number and the user entered the numbers shown on the left, note the list of missing and duplicate numbers: Input Sequence Output ---------------------- --------------- 1 2 4 7 4 4 5 10 8 2 6 Duplicate 2 ( 2 times) Missing 3 Duplicate 4 ( 3 times ) Missing 9

1 Answers  

How to swap two ASCII numbers?

0 Answers