/**
 * @file    strjion.c
 * @brief   
 */

#include <stdarg.h>
#include <stdio.h>
#include <string.h>

char *strjoin(char *s, int n, ...)
{
    va_list ap;
    char *ptr, *arg;
    int i;
    size_t len;

    va_start(ap, n);
    ptr = s;
    for (i = 0; i < n; i++) {
        arg = va_arg(ap, char *);
        len = strlen(arg) + 1;
        memcpy(ptr, arg, len);
        ptr += len;
    }
    va_end(ap);

    return s;
}

int main(int argc, char *argv[])
{
    int i;
    char s[1024];

    strjoin(s, 3, "123", "456", "789");

    for (i = 0; i < 12; i++) {
        printf("%02x ", (unsigned int)(unsigned char)s[i]);
    }
    printf("\n");

    return 0;
}