写一个Linux下包含中文的base64解码代码

好的，以下是在Linux下包含中文的base64解码代码：

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

char* base64_decode(const char* input, int length) {
    BIO* b64 = BIO_new(BIO_f_base64());
    BIO* bmem = BIO_new(BIO_s_mem());
    BIO_set_flags(b64, BIO_FLAGS_BASE64_NO_NL);
    BIO_push(b64, bmem);
    BIO_write(bmem, input, length);
    BIO_flush(bmem);
    char* output = (char*)malloc(length);
    int len = BIO_read(b64, output, length);
    output[len] = '\0';
    BIO_free_all(b64);
    return output;
}

int main() {
    char input[] = "5oiR5piv5L2g5aW977yM5Lu25oiW55qE5ZCM6K6k5L2V5LiA5Liq5o6o5Lya5YWo5L2c5oiQ5YyW5Y+K5Lq65Lq66K+V5pWw5YyX";
    char* output = base64_decode(input, strlen(input));
    printf("Decoded text: %s\n", output);
    free(output);
    return 0;
}

请问还有其他问题吗？