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Thursday, October 6, 2011

Write a C program to generate all the prime numbers between 1 and n, where n is a value supplied by the user.


/* Write a C program to generate all the prime numbers between 1 and n, where n is a value supplied by the user. */


#include <stdio.h>


void main()
{
int no,counter,counter1,check;
clrscr();
printf("<-----------------------PRIME NO. SERIES------------------------>");
printf("\n\n\n\t\t\tINPUT THE VALUE OF N: ");
scanf("%d",&no);
printf("\n\nTHE PRIME NO. SERIES B/W 1 TO %d : \n\n",no);


for(counter = 1; counter <= no; counter++)
{
 check = 0;
 //THIS LOOP WILL CHECK A NO TO BE PRIME NO. OR NOT.


 for(counter1 = counter-1; counter1 > 1 ; counter1--)
   if(counter%counter1 == 0)
   {
    check++;        // INCREMENT CHECK IF NO. IS NOT A PRIME NO.
    break;
   }
   if(check == 0)
   printf("%d\t",counter);
}
getch();
}

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