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;
}

. Remove all the blank spaces between character.Matrix is of 10* 10. eg: INPUT ------------------------------------ | N | A | | V | |T ------------------------------------- | |G | U | |P | -------------------------------------- |T | | | A | | ------------------------------------ OUTPUT: ------------------------------------ | N | A | V | T | | ------------------------------------- |G |U | P | | | -------------------------------------- |T | A | | | | ------------------------------------

2 Answers   Nagarro,

1+1/2!+1/3!+...+1/n!

0 Answers  

Coin Problem You are given 9 gold coins that look identical. One is counterfeit and weighs a bit greater than the others, but the difference is very small that only a balance scale can tell it from the real one. You have a balance scale that costs 25 USD per weighing. Give an algorithm that finds the counterfeit coin with as little weighting as possible. Of primary importance is that your algorithm is correct; of secondary importance is that your algorithm truly uses the minimum number of weightings possible. HINT: THE BEST ALGORITHM USES ONLY 2 WEIGHINGS!!!

1 Answers   Motorola, Qatar University,

output for printf("printf");

0 Answers  

Definition of priority queue was given. We have to implement the priority queue using array of pointers with the priorities given in the range 1..n. The array could be accessed using the variable top. The list corresponding to the array elements contains the items having the priority as the array index. Adding an item would require changing the value of top if it has higher priority than top. Extracting an item would require deleting the first element from the corresponding queue. The following class was given: class PriorityQueue { int *Data[100]; int top; public: void put(int item, int priority); // inserts the item with the given priority. int get(int priority); // extract the element with the given priority. int count(); // returns the total elements in the priority queue. int isEmpty(); // check whether the priority queue is empty or not. }; We had to implement all these class functions.

0 Answers   Nagarro, Wollega University,

What will be the output- for(i=1;i<=3;i++) { printf("%d",i); continue; i++; }

5 Answers   Impetus,

write a program using 2 D that searches a number and display the number of items 12 inputs values input 15,20, 13, 30, 38, 40,16, 18, 20 ,18 ,20 enter no. to search : 20

0 Answers  

write a program that accepts a number and outputs its equivalent in words. take note that the maximum input is 3000

1 Answers   Alvin,

Wrie a function which returns the most frequent number in a list of integers. Handle the case of more than one number which meets this criterion. public static int[] GetFrequency(int[] list)

3 Answers   Nagarro,

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  

how to find out the maximum number out of the three inputs.

6 Answers   ABC, Apple, C3I, HP, TCS,

#include<iostream.h> //main() //{ class A { friend class B; public: void read(); }; class B { public : int a,b; }; void A::read() { cout<<"welcome"; } main() { A x; B y; y.read(); } In the above program......, as B is a friend of A B can have access to all members,i cant access y.read . could you please tell me the reason and what would i code to execute this program?

2 Answers