error: initializer element is not constant

[Arinerron]

Trying to test it out by compiling the sample code, but I get an error:

test.c:4:8: error: initializer element is not constant
 struct NtruEncParams params = NTRU_DEFAULT_PARAMS_128_BITS; /*see section "Parameter Sets" below*/
        ^
test.c:7:1: error: expected identifier or ‘(’ before ‘if’
 if (ntru_rand_init(&rand_ctx_def, &rng_def) != NTRU_SUCCESS)
 ^
test.c:10:1: error: expected identifier or ‘(’ before ‘if’
 if (ntru_gen_key_pair(&params, &kp, &rand_ctx_def) != NTRU_SUCCESS)
 ^

the sample code is

#include "ntru.h"

/* key generation */
struct NtruEncParams params = NTRU_DEFAULT_PARAMS_128_BITS; /*see section "Parameter Sets" below*/
NtruRandGen rng_def = NTRU_RNG_DEFAULT;
NtruRandContext rand_ctx_def;
if (ntru_rand_init(&rand_ctx_def, &rng_def) != NTRU_SUCCESS)
    printf("rng fail\n");
NtruEncKeyPair kp;
if (ntru_gen_key_pair(&params, &kp, &rand_ctx_def) != NTRU_SUCCESS)
    printf("keygen fail\n");

Any idea of what to do?