Question

C program to find prime numbers

Answer 1

#include<stdio.h>
#include<conio.h>
void main()
{
int a,b; // initialization of variables
clrscr(); // clear screen
printf("Enter a Number:"); // display message
scanf("%d",&a); //get value
printf("\n\nPrime Factors of %d is: ",a); //display message
for(b=2;b<=n;b++) //loop
{ // starting of for loop
if(a%b==0) // if a/b and remainder is 0 then
{
printf("%d,",b);
a=a/b;
b--;
if(a==1)
break;
}
}
getche();
}

Answer 2

@ParthKohli

Answer 3

Even though I don't understand this, I like it :P
Great work!
I appreciate it :)

Answer 4

\[\Huge \ddot \smile \]

Answer 5

its for finding prime number but in C

Answer 6

Yeah.. I can see that :)

Answer 7

I'm able to read the code a little.
If(a%b == 0) means that the modulus of a and b is 0, correct?

Answer 8

More like \(a \text{ mod} b = 0\).
== defines checking something.

Answer 9

yes but % = remainder operator

Answer 10

Yes, it's the same thing. :)
http://www.cprogramming.com/tutorial/modulus.html

Answer 11

yap

Answer 12

http://pythonism.wordpress.com/2008/05/04/looking-at-prime-numbers-in-python/

Answer 13

python programming

Answer 14

So, wish me luck in Python!

Answer 15

Annas dada ki\[\Huge\mathsf{\text{Jai Ho!}} \]

Answer 16

lol

Answer 17

@annas is this the program to write the prime numbers or the program to find out the prime factors of a number..???

Answer 18

@anusha.p its for prime factors of a number thanks for figuring that out :)

Answer 19

u didn't declare n annas....aslo..u didn't initialize n...

Answer 20

thank you @anusha.p my typo mistake i m sorry lemme correct it

Answer 21

first of all prime number program:
#include<stdio.h>
#include<conio.h>
void main()
{
int n, i = 3, count, c;

printf("Enter the number of prime numbers required\n");
scanf("%d",&n);

if ( n >= 1 )
{
printf("First %d prime numbers are :\n",n);
printf("2\n");
}

for ( count = 2 ; count <= n ; count++ )
{
for ( c = 2 ; c <= i - 1 ; c++ )
{
if ( i%c == 0 )
break;
}
if ( c == i )
{
printf("%d\n",i);
count++;
}
i++;
}

return 0;
}

Answer 22

also...
if(a%b==0)
{...........
.............
}
if(a==1)
{
..........
.........
}
getch();
}

Answer 23

#include<stdio.h>
#include<conio.h>
void main()
{
int a,b; // initialization of variables
clrscr(); // clear screen
printf("Enter a Number:"); // display message
scanf("%d",&a); //get value
printf("\n\nPrime Factors of %d is: ",a); //display message
for(b=2;b<=a;b++) //loop
{ // starting of for loop
if(a%b==0) // if a/b and remainder is 0 then
{
printf("%d,",b);
a=a/b;
b--;
if(a==1)
break;
}
}
getche();
}
now its ok actually i wrote it in hurry so got some mistakes. and @anusha.p i m very much thankful to you for helping me out :) really appreciated it. @anusha.p brackets are rightly placed :)

Answer 24

no mention..........
yeah..braces are at their respective places only....lol.......sorry..

Answer 25

oh there is one more mistake :
#include<stdio.h>
#include<conio.h>
void main()
{
int a,b; // initialization of variables
clrscr(); // clear screen
printf("Enter a Number:"); // display message
scanf("%d",&a); //get value
printf("\n\nPrime Factors of %d is: ",a); //display message
if(a==1){
break; }
else{
for(b=2;b<=a;b++) //loop
{ // starting of for loop
if(a%b==0) // if a/b and remainder is 0 then
{
printf("%d,",b);
a=a/b;
b--;
}
}
}
getche();
}

Answer 26

what i did is i put the if condition where the user gives value

Answer 27

thank you once again @anusha.p

Answer 28

getch() and getche() are used to get input from the keyboard in character but in getche() it will display character on screen too. here "e" stands for echo