Printing the return value from inet_aton() function

Question

I have this code which is working fine:

#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
    struct in_addr addr;

    if (argc != 2) {
        fprintf(stderr, "%s <dotted-address>\n", argv[0]);
        exit(EXIT_FAILURE);
    }

    if (inet_aton(argv[1], &addr) == 0) {
        perror("inet_aton");
        exit(EXIT_FAILURE);
    }

    printf("%s\n", inet_ntoa(addr));
    exit(EXIT_SUCCESS);
}

What I want to achieve is print the value of inet_aton() function. The description of function says that it returns a number, but when I try to print it, it says "cannot covert from address structure to decimal".

`addr.s_addr` should be an unsigned integer. See e.g. http://man7.org/linux/man-pages/man7/ip.7.html — brm, Apr 05 '15 at 15:22
*Where* do you get the error? And can you please edit your question to include more details (like if it's a compiler error or a runtime error, the *actual* and *complete* error). — Some programmer dude, Apr 05 '15 at 15:22

score 0 · Accepted Answer · answered Apr 05 '15 at 15:27

0

Using this instead of your last printf worked for me:

printf("%d\n", addr.s_addr);

answered Apr 05 '15 at 15:27

brenns10

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If you just do `printf("%d\n", addr);`, you'll get a compiler warning (since this is bad form), but it will still work. – brenns10 Apr 05 '15 at 15:28

Printing the return value from inet_aton() function

1 Answers1