创建两个文件，并将文件中对应的数字相加

「爱情、让人受尽委屈。」 2022-07-16 10:50 139阅读 0赞

[手动创建两个文本文件text1.txt,text2.txt,要求编程创建text3.txt,实现text1.txt和text2.txt文件中除去首行和末尾，其余对应的数据相加,三个文本的内容如下][text1.txt_text2.txt_text3.txt_text1.txt_text2.txt]

text1.txt
    begin
    10 11 12
    20 21 22
    30 31 32
    end 
    
    text2.txt
    begin
    15 16 17
    25 26 27
    35 36 37
    end 
    
    text3.txt
    begin
    25 27 29
    45 47 49
    65 67 69
    end

#include <stdio.h>
    #include <stdlib.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>
    #include <unistd.h>
    #include <string.h>
    #define BUFFERSIZE 1024
    
    int main()
    {
        int fd1;
        int fd2;
        int fd3;
        int len1;
        int len2;
        int i;
        int read_bytes;
        int write_bytes;
    
        char buffer1[BUFFERSIZE];
        char buffer2[BUFFERSIZE];
        char buffer3[BUFFERSIZE];
        char *ptr;
    
        fd1 = open("text1.txt", O_RDONLY);
        fd2 = open("text2.txt", O_RDONLY);
        fd3 = open("text3.txt", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
    
        len1 = read(fd1, buffer1, BUFFERSIZE);
        len2 = read(fd2, buffer2, BUFFERSIZE);
        while(read_bytes = read(fd1, buffer1, BUFFERSIZE))
        {
            if(-1 == read_bytes) 
            {
                break;
            }
        }
        buffer1[len1] = '\0';
        while(read_bytes = read(fd2, buffer2, BUFFERSIZE))
        {
            if(-1 == read_bytes) 
            {
                break;
            }
        }
        buffer2[len2] = '\0';
    
        strcpy(buffer3, buffer2);
        i = 0;
        while(buffer2[i] != '\0') 
        {
            if((buffer2[i] >= '0') && (buffer2[i] <= '9'))
            {
                buffer3[i] = buffer1[i] + buffer2[i] - '0';
            }
            i++;
        }
    
        write(fd3, buffer3, strlen(buffer1));
        printf("%s\n", buffer3);
        close(fd1);
        close(fd2);
        close(fd3);
       
        return 0;
    }

[text1.txt_text2.txt_text3.txt_text1.txt_text2.txt]: http://blog.csdn.net/u011415429/article/details/9777401