用C语言完成以下程序：现有三个进程分别问进程一，进程二和进程三，两个管道，管道一和管道二，进程一负责从data.txt中读取数值并放入管道一中，注意，data.txt中存放的都是整型数据；进程二从管道中取走数据，对每一个数据进行加1的操作，并将所有新的数据放入管道二中；进程三负责从管道三中取出数据并将其存放在result.txt文件中。注意，result.txt文件一开始并不存在。最后，程序结束。请给C语言代码。

以下是题目所需的C语言代码：

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
#include <fcntl.h>

#define PIPE1_READ 0
#define PIPE1_WRITE 1
#define PIPE2_READ 2
#define PIPE2_WRITE 3

int main() {
    int pipe1[2], pipe2[2];
    pid_t pid1, pid2, pid3;

    if (pipe(pipe1) < 0 || pipe(pipe2) < 0) {
        perror("pipe error");
        exit(EXIT_FAILURE);
    }

    if ((pid1 = fork()) < 0) {
        perror("fork error");
        exit(EXIT_FAILURE);
    } else if (pid1 == 0) {
        close(pipe1[PIPE_READ]);
        close(pipe2[PIPE_READ]);
        close(pipe2[PIPE_WRITE]);

        int fd = open("data.txt", O_RDONLY);
        if (fd < 0) {
            perror("open error");
            exit(EXIT_FAILURE);
        }

        int num;
        while (read(fd, &num, sizeof(num)) > 0) {
            write(pipe1[PIPE_WRITE], &num, sizeof(num));
        }

        close(fd);
        close(pipe1[PIPE_WRITE]);

        exit(EXIT_SUCCESS);
    }

    if ((pid2 = fork()) < 0) {
        perror("fork error");
        exit(EXIT_FAILURE);
    } else if (pid2 == 0) {
        close(pipe1[PIPE_WRITE]);
        close(pipe2[PIPE_READ]);

        int num;
        while (read(pipe1[PIPE_READ], &num, sizeof(num)) > 0) {
            num += 1;
            write(pipe2[PIPE_WRITE], &num, sizeof(num));
        }

        close(pipe1[PIPE_READ]);
        close(pipe2[PIPE_WRITE]);

        exit(EXIT_SUCCESS);
    }

    if ((pid3 = fork()) < 0) {
        perror("fork error");
        exit(EXIT_FAILURE);
    } else if (pid3 == 0) {
        close(pipe1[PIPE_READ]);
        close(pipe1[PIPE_WRITE]);
        close(pipe2[PIPE_WRITE]);

        int fd = open("result.txt", O_CREAT | O_TRUNC | O_WRONLY, 0644);
        if (fd < 0) {
            perror("open error");
            exit(EXIT_FAILURE);
        }

        int num;
        while (read(pipe2[PIPE_READ], &num, sizeof(num)) > 0) {
            write(fd, &num, sizeof(num));
        }

        close(fd);
        close(pipe2[PIPE_READ]);

        exit(EXIT_SUCCESS);
    }

    close(pipe1[PIPE_READ]);
    close(pipe1[PIPE_WRITE]);
    close(pipe2[PIPE_READ]);
    close(pipe2[PIPE_WRITE]);

    waitpid(pid1, NULL, 0);
    waitpid(pid2, NULL, 0);
    waitpid(pid3, NULL, 0);

    return 0;
}

注意，以上代码仅供参考，可能存在一些错误或不足之处，需要根据实际情况进行修改。