Display some characters in a new file

Question

I want to read 'c' and "Hello world!!" but i see just the hexadecimal part.

Here the structure :

typedef struct step
{  

int n;

 char l;

 char c[25];                                                      

 } toto;




    int fd = open("one-structure.yolo", O_CREAT | O_WRONLY, 777);
    toto some;

    some.n = 212347;
    some.l = 'c';
    some.c[25]  = "Hello world!!";
    write(fd, &some.n, sizeof(int));
    write(fd, some.l, sizeof(char));
    write(fd, some.c, 13);

    close(fd);

the result : {=U@�f

This should not have compiled on a conforming implementation. — EOF, Apr 26 '19 at 07:09

score 2 · Answer 1 · answered Apr 26 '19 at 07:08

2

Apart from the problem pointed by Sourav Ghosh.

You cannot assign string to array using assignment operator.

some.c[25]  = "Hello world!!";

You need to use strcpy.

   strcpy(some.c, "Hello world!!");

or

make some.c as pointer.

answered Apr 26 '19 at 07:08

kiran Biradar

12,700
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score 1 · Answer 2 · answered Apr 26 '19 at 07:13

1

In addition to Kiran answer, you need to change write(fd, some.l, sizeof(char)); to write(fd, &some.l, sizeof(char)); as write needs a pointer.

answered Apr 26 '19 at 07:13

Ed Heal

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Display some characters in a new file

2 Answers2