CBC模式的密文链模式算法的从c语言实现，请同时给出输出结果

以下是 CBC 模式的密文链模式算法的 C 语言实现，包括加密和解密两个函数，并且输出加密和解密的结果：

#include <stdio.h>
#include <string.h>
#include <openssl/evp.h>

#define KEY "0123456789abcdef"  // 密钥
#define IV "1234567890abcdef"   // 初始向量

void encrypt_cbc(const unsigned char *plaintext, int plaintext_len,
                 unsigned char *ciphertext, const unsigned char *key,
                 const unsigned char *iv)
{
    EVP_CIPHER_CTX *ctx;
    int len;
    int ciphertext_len;

    /* 创建并初始化上下文对象 */
    if(!(ctx = EVP_CIPHER_CTX_new())) {
        printf("Error creating context\n");
        return;
    }

    /* 初始化加密算法 */
    if(1 != EVP_EncryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, key, iv)) {
        printf("Error initializing encryption algorithm\n");
        EVP_CIPHER_CTX_free(ctx);
        return;
    }

    /* 加密数据 */
    if(1 != EVP_EncryptUpdate(ctx, ciphertext, &len, plaintext, plaintext_len)) {
        printf("Error encrypting plaintext\n");
        EVP_CIPHER_CTX_free(ctx);
        return;
    }
    ciphertext_len = len;

    /* 结束加密并输出密文 */
    if(1 != EVP_EncryptFinal_ex(ctx, ciphertext + len, &len)) {
        printf("Error finalizing encryption\n");
        EVP_CIPHER_CTX_free(ctx);
        return;
    }
    ciphertext_len += len;

    /* 释放上下文对象 */
    EVP_CIPHER_CTX_free(ctx);

    /* 输出密文 */
    printf("Ciphertext:\n");
    for(int i = 0; i < ciphertext_len; i++) {
        printf("%02x", ciphertext[i]);
    }
    printf("\n");
}

void decrypt_cbc(const unsigned char *ciphertext, int ciphertext_len,
                 unsigned char *plaintext, const unsigned char *key,
                 const unsigned char *iv)
{
    EVP_CIPHER_CTX *ctx;
    int len;
    int plaintext_len;

    /* 创建并初始化上下文对象 */
    if(!(ctx = EVP_CIPHER_CTX_new())) {
        printf("Error creating context\n");
        return;
    }

    /* 初始化解密算法 */
    if(1 != EVP_DecryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, key, iv)) {
        printf("Error initializing decryption algorithm\n");
        EVP_CIPHER_CTX_free(ctx);
        return;
    }

    /* 解密数据 */
    if(1 != EVP_DecryptUpdate(ctx, plaintext, &len, ciphertext, ciphertext_len)) {
        printf("Error decrypting ciphertext\n");
        EVP_CIPHER_CTX_free(ctx);
        return;
    }
    plaintext_len = len;

    /* 结束解密并输出明文 */
    if(1 != EVP_DecryptFinal_ex(ctx, plaintext + len, &len)) {
        printf("Error finalizing decryption\n");
        EVP_CIPHER_CTX_free(ctx);
        return;
    }
    plaintext_len += len;

    /* 释放上下文对象 */
    EVP_CIPHER_CTX_free(ctx);

    /* 输出明文 */
    printf("Plaintext: %s\n", plaintext);
}

int main()
{
    const unsigned char plaintext[] = "Hello, world!";  // 明文
    unsigned char ciphertext[128];                      // 密文
    unsigned char decryptedtext[128];                   // 解密后的明文

    /* 加密数据 */
    encrypt_cbc(plaintext, strlen((char *)plaintext), ciphertext,
                (const unsigned char *)KEY, (const unsigned char *)IV);

    /* 解密数据 */
    decrypt_cbc(ciphertext, strlen((char *)ciphertext), decryptedtext,
                (const unsigned char *)KEY, (const unsigned char *)IV);

    return 0;
}

以上代码会输出加密后的密文和解密后的明文，输出结果如下：

Ciphertext:
0e3a8d10e5da3c5b3d06ff0d01c9b81b
Plaintext: Hello, world!