Find the Prime Factors of Given Number source code

This snippet submitted by SHINE AIYYAPPAN on 2012-06-29. It has been viewed 19852 times.
Rating of 4.8 with 88 votes

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <ctype.h>

int main()
{
    int x,div=2;


    int i=0,j=0;
    printf("Enter Number X : ");
    scanf("%d",&x);
    int num=x;
    int *prime=(int *) malloc(x*sizeof(int));
    printf("\n Allocated \n");
    getch();
    if (x==1 || x==0)
    { printf(" Number %d have no prime Factors",x);
	*prime=0;
    }
    else
    { while(x>1)
	{  if ((x%div)==0)
	    { *(prime+i)=div;x=x/div;i++;printf("\n Prime Factor\n");

	    }
	    else
	    { div++; }

	}


    }

    printf("\n The Prime Factors for Number %d are  :\n",num);

    for(j=0;j<i;j++)

    { printf (" %d ",*(prime+j));   }

    return(0);
}

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