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  • INTERVIEW QUESTIONS LANGUAGES C DETAILS
    Question :
    Write a program which accepts a filename as a command line argument and reverses the contents of the file( ie first character

    becomes the last character of the file and so on)


    Input: The program takes the file name whose content should be reversed.

    Output: The program reverses the contents of the file.




    Category C Interview Questions
    Rating (0.0) By 0 users
    Added on 7/17/2006
    Views 590
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    Answers:

    #include #include int main(int argc, char *argv[]){ int fd, i, fsize; char *first=(char *) malloc(1); char *last=(char *) malloc(1); if (argc != 2) { printf("pass two argumentsn"); exit (-1); } /* Open the file */ fd = open(argv[1], O_RDWR); if (fd == -1) { printf("error in file openingn"); exit (-1); }#ifdef PRINT printf("File Open Sucessn");#endif /* Find the file size */ fsize = lseek(fd, 0, SEEK_END);#ifdef PRINT printf("File Size = %dn", fsize);#endif /* Reverse the file */ for (i=0; i



    #include<stdio.h>
    #include<unistd.h>
    #include<fcntl.h>
    #include<string.h>

    int main()
    {
    int fd=0,i=0,len=0;
    char buf[100];
    fd=open("file.txt",O_RDONLY);

    read(fd,buf,sizeof(buf));
    len=strlen(buf);

    for(i=len;i>=0;--i)
    printf("%c",buf[i]);
    printf(" ");

    }



     Posted by: anoj    

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