#include <yaml.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void add_comment(yaml_emitter_t * emitter, char * comment) {
    yaml_emitter_flush(emitter);
    printf("\n%s", comment);
}
int yaml_list_emit(yaml_emitter_t *emitter, yaml_event_t *event, char* list_name, char ** list, int list_length) {
    yaml_scalar_event_initialize(event, NULL, (yaml_char_t *)YAML_STR_TAG,
        (yaml_char_t *)list_name, strlen(list_name), 1, 0, YAML_PLAIN_SCALAR_STYLE);
    if (!yaml_emitter_emit(emitter, event)) goto error;
    yaml_sequence_start_event_initialize(event, NULL, (yaml_char_t *)YAML_SEQ_TAG,
        1,  YAML_FLOW_SEQUENCE_STYLE);
    if (!yaml_emitter_emit(emitter, event)) goto error;
    for (int i=0; i<list_length; i++) {
        yaml_scalar_event_initialize(event, NULL, (yaml_char_t *)YAML_STR_TAG,
            (yaml_char_t *)list[i], strlen(list[i]), 1, 0, YAML_PLAIN_SCALAR_STYLE);
        if (!yaml_emitter_emit(emitter, event)) goto error;
    }
    yaml_sequence_end_event_initialize(event);
    if (!yaml_emitter_emit(emitter, event)) goto error;
    return EXIT_SUCCESS;
error:
    fprintf(stderr, "Failed to emit event %d: %s\n", event->type, emitter->problem);
    yaml_emitter_delete(emitter);
    return EXIT_FAILURE;
}
int main(int argc, char *argv[]) {
    char* my_list1[]={"one","two"};
    int my_list1_length=2;
    char* my_list2[]={"aaa","bbb","ccc"};
    int my_list2_length=3;
    yaml_emitter_t emitter;
    yaml_event_t event;
    yaml_emitter_initialize(&emitter);
    yaml_emitter_set_output_file(&emitter, stdout);
    yaml_stream_start_event_initialize(&event, YAML_UTF8_ENCODING);
    if (!yaml_emitter_emit(&emitter, &event)) goto error;
    yaml_document_start_event_initialize(&event, NULL, NULL, NULL, 0);
    if (!yaml_emitter_emit(&emitter, &event)) goto error;
    yaml_mapping_start_event_initialize(&event, NULL, (yaml_char_t *)YAML_MAP_TAG,
        1, YAML_ANY_MAPPING_STYLE);
    if (!yaml_emitter_emit(&emitter, &event)) goto error;
    add_comment(&emitter, "#my first list");
    if (yaml_list_emit(&emitter, &event, "list1", my_list1, my_list1_length)) return EXIT_FAILURE;
    add_comment(&emitter, "#my second list");
    if (yaml_list_emit(&emitter, &event, "list2", my_list2, my_list2_length)) return EXIT_FAILURE;
    yaml_mapping_end_event_initialize(&event);
    if (!yaml_emitter_emit(&emitter, &event)) goto error; 
    yaml_document_end_event_initialize(&event, 0);
    if (!yaml_emitter_emit(&emitter, &event)) goto error;
    yaml_stream_end_event_initialize(&event);
    if (!yaml_emitter_emit(&emitter, &event)) goto error;
    yaml_emitter_delete(&emitter);
    return EXIT_SUCCESS;
error:
    fprintf(stderr, "Failed to emit event %d: %s\n", event.type, emitter.problem);
    yaml_emitter_delete(&emitter);
    return EXIT_FAILURE;
}

---
#my first list
list1: [one, two]
#my second list
list2: [aaa, bbb, ccc]
...

这些行是问题所在：
yaml_document_start_event_initialize(&event, NULL, NULL, NULL, 0);
/* 省略 */
yaml_document_end_event_initialize(&event, 0);
最后一个参数`implicit`定义是否发出显式标记。您将其设置为`0`，这意味着*发出显式标记*。将其设置为`1`以避免标记。
如果您正在寻找C中的更高级API，您可以查看[libyaml_constructor](https://github.com/flyx/libyaml_constructor)（我的工作），它读取C头文件并自动生成使用libyaml来序列化/反序列化该文件中的结构的代码。请注意，`libyaml_constructor`已开发到能够完成其所需工作，并且在那之后没有进行维护。