#include <math.h>#include <stdio.h>#include "patchwerk.h"#include "core.h"#include "wavout/wavout.h"#include "sine/sine.h"#include "scale/scale.h"#include "arith/arith.h" int patch(sk_core *core){    int rc;     /* paranoid error checking */     rc = sk_core_constant(core, 5);    SK_ERROR_CHECK(rc);    rc = sk_core_constant(core, 40);    SK_ERROR_CHECK(rc);    rc = sk_node_sine(core);    SK_ERROR_CHECK(rc);     rc = sk_core_constant(core, 440);    SK_ERROR_CHECK(rc);    rc = sk_node_add(core);    SK_ERROR_CHECK(rc);     rc = sk_core_constant(core, 0.1);    SK_ERROR_CHECK(rc);    rc = sk_node_sine(core);    SK_ERROR_CHECK(rc);    rc = sk_node_wavout(core, "test.wav");    SK_ERROR_CHECK(rc);     return 0;} int main(int argc, char *argv[]){    sk_core *core;    unsigned int n;    unsigned int nblocks;    int rc;     core = sk_core_new(44100);     rc = patch(core);     if (rc) {        fprintf(stderr, "Error code %d\n", rc);        goto clean;    }     nblocks = sk_core_seconds_to_blocks(core, 10);     for (n = 0; n < nblocks; n++) {        sk_core_compute(core);    }     clean:    sk_core_del(core);    return rc;}