C语言 错误：字符串常量前的预期声明说明符或“...”
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error: expected declaration specifiers or '…' before string constant
提问by Wouter
Does anybody know what is wrong with this piece of code? i can't see to find the issue among the comparable questions.
有人知道这段代码有什么问题吗？我看不到在可比问题中找到问题。
The code is written in C, and i keep getting this error. I do add -D SET_MIN_TEMP=5 -D Set_MAX_TEMP=30to the gcc compile line to make sure the ifndefs should be false...
代码是用 C 编写的，我一直收到这个错误。我确实添加-D SET_MIN_TEMP=5 -D Set_MAX_TEMP=30到 gcc 编译行以确保 ifndefs 应该是假的...
#ifndef CONFIG_H
#define CONFIG_H
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <stdint.h>
#ifndef RUN_AVG_LENGTH
#define RUN_AVG_LENGTH 5
#endif
#ifndef SET_MIN_TEMP
printf("please set SET_MIN_TEMP \n");
#endif
#ifndef SET_MAX_TEMP
printf("please set SET_MAX_TEMP \n");
#endif
typedef uint16_t sensor_id_t;
typedef uint16_t room_id_t;
typedef double sensor_value_t;
typedef time_t sensor_ts_t; // UTC timestamp as returned by time() - notice that the size of time_t is different on 32/64 bit machine
typedef struct {
sensor_id_t id;
sensor_value_t value;
sensor_ts_t ts;
} sensor_data_t;
typedef struct {
sensor_id_t sensor_id;
room_id_t room_id;
double running_avg[5];
sensor_ts_t timestamp;
} sensor_node_t;
#endif // CONFIG_H
