Loop program to start from top again

[ma21212]

I looked around but Im having trouble trying to make my program run again, it draws a diamond, I want it to run over and over again asking the user to put in another size for the diamond. I added a line of "while ( b > 0)" but this just makes it run forever.

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

int main()
{

int s;
int a;
int b;

printf("enter size of diamond\n");
scanf("%d",&b);

if (b == '0')
{
exit(0);
}


while ( b > 0)



for(s=1; s<=b; s++)
{

        for(a=1; a<=b-s; a++)

        {
        printf(" ");
        }

                for(a=1; a<=2*s-1; a++)

                {
                printf("*");
                }

printf("\n");

}

for(s=1; s<b; s++)
{

        for(a=1; a<=s; a++)
        {
        printf(" ");
        }

                for(a=2*b-2*s-1; a>=1; a--)
                {
                printf("*");
                }

printf("\n");


return(0);

}

anyhelp would be appreciated...

[gelatine]

ok i also made exactly the same program some while ago. here is my code (it keeps asking for a new number) and maybe you could improve your code with this.

#include <iostream>
using namespace std;
int main ()
{ 
   int n, i, k, j; char space=0x20;
   while (n>0) {
      cin>>n; cout<<endl;
      for(i=1;i<=n;i++)
        {
	 for (k=n-i;k>=0;k--)
	    { 
               cout << space;
            }
         for(j=1;j<=2*i-1;j++)       
            {
                cout<<"*";
            }
         cout<<endl;
       }

       for(i=n-1;i>=1;i--)
          {
	   for (k=0;k<(n-i)+1;k++)
	       { 
                   cout << space;
               }
	   for(j=2*i-1;j>=1;j--)       
               {
                    cout<<"*";
               }
           cout<<endl;
        }
   } 
system("pause");
return 0;
}

[j2NvC542]

I think you have missing curly braces there, ma21212. Right after the mentioned while statement.

[gelatine]

you also miss } at line 57