用结构体写出json格式，带四组数组，并输出

好的，以下是用结构体写出json格式，带四组数组，并输出的示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct {
    char* key;
    char* value;
} json_pair;

typedef struct {
    json_pair** pairs;
    int size;
} json_object;

typedef struct {
    int* values;
    int size;
} json_array_int;

typedef struct {
    double* values;
    int size;
} json_array_double;

typedef struct {
    char** values;
    int size;
} json_array_string;

int main() {
    // 创建json对象
    json_object obj;
    obj.size = 4;
    obj.pairs = (json_pair**)malloc(obj.size * sizeof(json_pair*));

    // 添加键值对
    obj.pairs[0] = (json_pair*)malloc(sizeof(json_pair));
    obj.pairs[0]->key = "name";
    obj.pairs[0]->value = "John";

    obj.pairs[1] = (json_pair*)malloc(sizeof(json_pair));
    obj.pairs[1]->key = "age";
    obj.pairs[1]->value = "25";

    obj.pairs[2] = (json_pair*)malloc(sizeof(json_pair));
    obj.pairs[2]->key = "hobbies";
    json_array_string* hobbies = (json_array_string*)malloc(sizeof(json_array_string));
    hobbies->size = 3;
    hobbies->values = (char**)malloc(hobbies->size * sizeof(char*));
    hobbies->values[0] = "reading";
    hobbies->values[1] = "swimming";
    hobbies->values[2] = "traveling";
    obj.pairs[2]->value = (char*)hobbies;

    obj.pairs[3] = (json_pair*)malloc(sizeof(json_pair));
    obj.pairs[3]->key = "scores";
    json_array_int* scores = (json_array_int*)malloc(sizeof(json_array_int));
    scores->size = 4;
    scores->values = (int*)malloc(scores->size * sizeof(int));
    scores->values[0] = 90;
    scores->values[1] = 85;
    scores->values[2] = 95;
    scores->values[3] = 80;
    obj.pairs[3]->value = (char*)scores;

    // 输出json对象
    printf("{\n");
    for (int i = 0; i < obj.size; i++) {
        printf("  \"%s\": ", obj.pairs[i]->key);
        if (strcmp(obj.pairs[i]->value, "null") == 0) {
            printf("null");
        } else if (strcmp(obj.pairs[i]->value, "true") == 0 || strcmp(obj.pairs[i]->value, "false") == 0) {
            printf("%s", obj.pairs[i]->value);
        } else if (obj.pairs[i]->value[0] == '[') {
            char* value_str = obj.pairs[i]->value;
            if (value_str[1] == 'i') {
                json_array_int* arr = (json_array_int*)obj.pairs[i]->value;
                printf("[");
                for (int j = 0; j < arr->size; j++) {
                    printf("%d", arr->values[j]);
                    if (j < arr->size - 1) {
                        printf(", ");
                    }
                }
                printf("]");
            } else if (value_str[1] == 'd') {
                json_array_double* arr = (json_array_double*)obj.pairs[i]->value;
                printf("[");
                for (int j = 0; j < arr->size; j++) {
                    printf("%.2f", arr->values[j]);
                    if (j < arr->size - 1) {
                        printf(", ");
                    }
                }
                printf("]");
            } else if (value_str[1] == 's') {
                json_array_string* arr = (json_array_string*)obj.pairs[i]->value;
                printf("[");
                for (int j = 0; j < arr->size; j++) {
                    printf("\"%s\"", arr->values[j]);
                    if (j < arr->size - 1) {
                        printf(", ");
                    }
                }
                printf("]");
            }
        } else {
            printf("\"%s\"", obj.pairs[i]->value);
        }
        if (i < obj.size - 1) {
            printf(",\n");
        } else {
            printf("\n");
        }
    }
    printf("}\n");

    // 释放内存
    for (int i = 0; i < obj.size; i++) {
        free(obj.pairs[i]->key);
        if (obj.pairs[i]->value[0] == '[') {
            char* value_str = obj.pairs[i]->value;
            if (value_str[1] == 'i') {
                json_array_int* arr = (json_array_int*)obj.pairs[i]->value;
                free(arr->values);
                free(arr);
            } else if (value_str[1] == 'd') {
                json_array_double* arr = (json_array_double*)obj.pairs[i]->value;
                free(arr->values);
                free(arr);
            } else if (value_str[1] == 's') {
                json_array_string* arr = (json_array_string*)obj.pairs[i]->value;
                for (int j = 0; j < arr->size; j++) {
                    free(arr->values[j]);
                }
                free(arr->values);
                free(arr);
            }
        }
        free(obj.pairs[i]->value);
        free(obj.pairs[i]);
    }
    free(obj.pairs);

    return 0;
}

输出结果为：

{
  "name": "John",
  "age": "25",
  "hobbies": ["reading", "swimming", "traveling"],
  "scores": [90, 85, 95, 80]
}