我是C语言的新手。我需要附加两个使用json_object库创建的json-c数组。这是我的代码:

struct json_object *obj1,*array1,*array2,*array3;

obj1 = json_object_new_object();

array1 = json_object_new_array();
json_object_array_add(array1, json_object_new_int(1));
json_object_array_add(array1, json_object_new_int(2));
json_object_array_add(array1, json_object_new_int(3));

json_object_object_add(obj1, "array1", array1);

array2 = json_object_new_array();
json_object_array_add(array2, json_object_new_int(4));
json_object_array_add(array2, json_object_new_int(5));
json_object_array_add(array2, json_object_new_int(6));

json_object_object_add(obj1, "array2", array2);

json_object_object_add(obj1, "array3", array1+array2);

但是我遇到了以下错误:



这不可能吗?我需要这样的输出:
{
   "array1:[1,2,3],
   "array2":[4,5,6],
   "array3":[1,2,3,4,5,6]
}

或者有可能向Json添加普通的C整数数组,像这样
int32_t smp[100]={0};

smp[0] = 1;
smp[1] = 2;
smp[2] = 3;
smp[3] = 4;
smp[4] = 5;
smp[5] = 6;

json_object_object_add(obj1, "array3", smp);

最佳答案

据我所知,json-c中没有“内置”函数来连接两个数组,但是您可以轻松地创建一个:

struct json_object * json_object_array_concat (struct json_object *array1,
                                               struct json_object *array2) {
    struct json_object *array3 = json_object_new_array();
    if (!array3) {
        return NULL;
    }
    int i,
        size1 = json_object_array_length(array1),
        size2 = json_object_array_length(array2);
    for (i = 0; i < size1; ++i) {
        json_object_array_add(array3, json_object_array_get_idx(array1, i));
    }
    for (i = 0; i < size2; ++i) {
        json_object_array_add(array3, json_object_array_get_idx(array2, i));
    }
    return array3;
}

然后使用它:
array3 = json_object_array_concat(array1, array2);

如果只想将array2附加到array1:
struct json_object * json_object_array_append (struct json_object *array1,
                                               struct json_object *array2) {
    int i,
        size2 = json_object_array_length(array2);
    for (i = 0; i < size2; ++i) {
        json_object_array_add(array1, json_object_array_get_idx(array2, i));
    }
    return array1;
}

关于c - 使用jsonc库在C语言中附加json_object_arrays,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/36998026/

10-11 23:16
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