Answer Posted / bibek

/*Program To Generate The Prime Factors Of An Entered
Numbers*/

/*Header Files*/
#include<stdio.h>


/*Function Prototypes*/
void factorcheck(long unsigned int prime,long unsigned int
num );
void primefind(long unsigned int num, long unsigned int
startnum);

void main()
{

long unsigned int num;

printf("\n Enter A Positive Number:");
scanf("%d", &num);
printf("\n ");

/*Call To the primefind() function*/
primefind(num,
1); /*Find
a prime less than the given number*/

if (num==0)
{
printf(" 0 \n \n");
}
else if (num==1)
{
printf(" 1 \n \n");
}
else
{
printf("\b \n
\n "); /*Delete the
extra 'x' left in the end*/
}

}

void primefind(long unsigned int num, long unsigned int
startnum)
{

long unsigned int counter1, counter2, primecheck;
char primestat;

for(counter1 = startnum; counter1<=num; counter1++)
{

for (counter2 = 2; counter2< counter1; counter2++)
{


primecheck = counter1 %
counter2; /* Check If The Chosen Number
(counter1) is divisible

by numbers less than it excluding 1*/
if (primecheck != 0 )
primestat
= 't'; /*The Number Is
Prime*/

else /*(So
Far)*/
{
primestat
= 'f'; /*The Number Is
Not Prime*/
break;
}

}

if (primestat =='t' || counter1 ==2)
{
factorcheck
(counter1,num); /*This Calls
The Function factorcheck()*/

break;
/* which checks if the prime number */
}
/*generated is a factor of the given
number*/


}

}

void factorcheck(long unsigned int prime, long unsigned int
num)
{
long unsigned int remainder;

remainder = num%prime;

if (remainder ==
0) /*since the remainder is 0,
the prime number is a factor*/
{
printf("%dx", prime);
primefind((num/prime), 1); /*Find
Another prime number*/
return;
}
else
primefind(num, prime+1); /*Since
The Generated Prime is not a factor,*/
/*the function
checks for the next prime number available*/
}

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