请生成一个树莓派控制空气温湿度传感器DHT11的C语言代码

好的，以下是树莓派控制DHT11传感器的C语言代码示例：

#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>

#define MAX_TIMINGS 85
#define DHT_PIN 7

int data[5] = { 0, 0, 0, 0, 0 };

bool read_dht_data()
{
    uint8_t last_state = HIGH;
    uint8_t counter = 0;
    uint8_t j = 0, i;

    data[0] = data[1] = data[2] = data[3] = data[4] = 0;

    pinMode(DHT_PIN, OUTPUT);
    digitalWrite(DHT_PIN, LOW);
    delay(18);

    digitalWrite(DHT_PIN, HIGH);
    delayMicroseconds(30);

    pinMode(DHT_PIN, INPUT);

    for (i = 0; i < MAX_TIMINGS; i++)
    {
        counter = 0;
        while (digitalRead(DHT_PIN) == last_state)
        {
            counter++;
            delayMicroseconds(1);
            if (counter == 255)
            {
                break;
            }
        }
        last_state = digitalRead(DHT_PIN);

        if (counter == 255)
        {
            break;
        }

        if ((i >= 4) && (i % 2 == 0))
        {
            data[j / 8] <<= 1;
            if (counter > 16)
            {
                data[j / 8] |= 1;
            }
            j++;
        }
    }

    if ((j >= 40) &&
        (data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF)))
    {
        return true;
    }
    else
    {
        return false;
    }
}

int main()
{
    if (wiringPiSetup() == -1)
    {
        exit(1);
    }

    while (1)
    {
        if (read_dht_data())
        {
            printf("Temperature = %d.%d °C, Humidity = %d.%d %%\n",
                data[2], data[3], data[0], data[1]);
        }
        else
        {
            printf("Failed to read DHT11 data\n");
        }

        delay(2000);
    }

    return 0;
}

这段代码使用了wiringPi库来控制树莓派的GPIO，读取DHT11传感器的温湿度数据，并将其打印出来。你需要在编译代码前安装wiringPi库，并将DHT_PIN的值设置为你使用的GPIO引脚。