Help me solve this C program finding prime numbers <=n,please !!?

#include %26lt;stdio.h%26gt;





main()


{


int n,i,j;





printf("\nInput n:");


scanf("%d",%26amp;n);


for (i=3;i%26lt;=n;i++)


{ int bool=0;


for (j=2;j%26lt;i;j++)


{


if ((i%j)!=0)


bool=1;


else


break;





}


if (bool=1) printf ("\nPrime number:%d",i);


}


}





Sth wrong w/ this code !!

Help me solve this C program finding prime numbers %26lt;=n,please !!?
#include%26lt;stdio.h%26gt;


#include%26lt;conio.h%26gt;


void main()


{


int count,i=1;


int a;


clrscr();


while(i%26lt;=500)


{


count=0;


a=1;


while(a%26lt;=i)


{


if(i%a==0)


count++;


a++;


}


if(count==2)


printf("%d\t",i);


i++;


}


getch();


}





just type this program and save as .c file


u will able to print prime numbers between 1 to 500


if u want more just replace 500 with urs range
Reply:There are a few glitches in your code.





for starters the main() method has no return type. It's default would be void, but in this case I assume you'd require a return type of int as a minimum; for example:


  int main() {





Your first loop to me seems right but I suspect it should read:


  for (i = 2; i %26lt;=n; i++) {





It would then be usual to provide a boolean of true, or in your case bool = 1





By the way, speaking of that bool, why not declare it up top along with the ints; i.e.:


  int n, i, j, bool;





You second for loop needs a minor amendment:


  for(j = 2; j %26lt;= i; j++) {








If you change that then if i == j you would continue


  Otherwise if( i%j==0) bool = 0; as this produces a false statement.





Thus your if((i%j) != 0) bool = 1; technically needs modification.





I'd be tempted to use the %26lt;iostream%26gt; rather than %26lt;Stdio%26gt; as well but I guess that is a matter of preference because if you use %26lt;iostream%26gt; you get the odd whitespace issues which require bits like std::cin and std::cout etcetera.





Just in case I missed something there here is how I'd write your problem if I was doing it. Perhaps something here will jog your mind to allow you to adapt your style.





#include%26lt;iostream%26gt;





int main()


{


int n , isprime;


std::cout%26lt;%26lt;"Enter number :";


std::cin%26gt;%26gt;n;


for( int i = 2 ; i %26lt;= n ; i++)


{


isprime = 1;


for( int j = 2 ; j %26lt;= i ; j++)


{


if( i == j)


continue;


else if( i % j == 0)


isprime = 0;


}


if(isprime)


std::cout%26lt;%26lt;i%26lt;%26lt;" ";


}


}

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