PI calculation to 29 digits using recursive fractional method

pi3.c

#include <stdio.h>
#include <math.h>
#define ld __float128

ld pie(int level);
ld cake(int level);
void sho(ld a);

//
// I borrowed sho() from:
// http://mathforum.org/kb/thread.jspa?threadID=2229919&messageID=7363928
//
int main()
{
    ld pi = 16 / cake(0) - 4 / pie(0);
    sho(pi);
    return 0;
}

ld pie(int level)
{
    if(level > 15) return 1;
    ld x = (478*level)+239 + (level+1)*(level+1) / pie(++level);
    return x;
}

ld cake(int level)
{
    if(level > 15) return 1;
    ld x = (10*level)+5 + (level+1)*(level+1) / cake(++level);
    return x;
}

void sho (ld a) {
        long double c = floor ((long double)(1e10Q * a));
        ld d = c, f = a - d/1e10Q, g=1e30Q * f;
        printf("%0.10Lf%020.0Lf\n", c/1e10L, (long double)g);
}