指出下面代码是否有问题,如果有,调整一下typedef struct { char vin[20]; long timestamp; char sdkVersion[128]; char deviceId[20]; } Register_Struct; char Register_body() { Register_Struct Register= { .vin = "12345", .timestamp = 1614279599, .sdkVersion = "1.0.0", .deviceId = "67890" }; // Convert struct to JSON json_t *root = json_object(); json_object_set_new(root, "vin", json_string(Register.vin)); json_object_set_new(root, "timestamp", json_integer(Register.timestamp)); json_object_set_new(root, "sdkVersion", json_string(Register.sdkVersion)); json_object_set_new(root, "deviceId", json_string(Register.deviceId)); char *json_str = json_dumps(root, JSON_INDENT(2)); printf("%s\n", json_str); // Clean up free(json_str); json_decref(root); return json_str; }
时间: 2024-01-26 21:04:22 浏览: 28
该代码存在以下问题:
1. 函数的返回值类型为 `char`,但是 `json_str` 的类型为 `char *`,应该修改函数的返回值类型为 `char *`。
2. 函数返回时,将 `json_str` 的内存释放,但是函数的返回值为 `json_str`,所以在释放内存之前应该将其返回。
下面是修改后的代码:
```
char* Register_body() {
Register_Struct Register = {
.vin = "12345",
.timestamp = 1614279599,
.sdkVersion = "1.0.0",
.deviceId = "67890"
};
// Convert struct to JSON
json_t* root = json_object();
json_object_set_new(root, "vin", json_string(Register.vin));
json_object_set_new(root, "timestamp", json_integer(Register.timestamp));
json_object_set_new(root, "sdkVersion", json_string(Register.sdkVersion));
json_object_set_new(root, "deviceId", json_string(Register.deviceId));
char* json_str = json_dumps(root, JSON_INDENT(2));
printf("%s\n", json_str);
// Clean up
json_decref(root);
return json_str;
}
```
修改后的代码中,函数的返回值类型为 `char *`,并且在释放内存之前将 `json_str` 返回。同时,将 `json_decref(root)` 移到了 `json_str` 释放之前。
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