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/