int mult (int x, int y);
void speak (const char* str);
unsigned char* arr ();

##</code><code>##

#include <stdio.h>
#include <stdlib.h>

int mult (int x, int y){
    return x * y;
}

void speak (const char* str){
    printf("%s\n", str);
}

unsigned char* arr (){
    unsigned char* list = malloc(sizeof(unsigned char) * 3);

    int i;

    for (i=0; i<3; i++){
        list[i] = i;
    }

    return list;
}

##</code><code>##

#include <stdio.h>
#include "xswrap.h"

int main (){
    int ret = mult(5, 5);
    printf("%d\n", ret);

    speak("hello, world!");

    unsigned char* list = arr(); 

    int i;

    for (i=0; i<3; i++){
        printf("%d\n", list[i]);
    }

    return 0;
}

##</code><code>##

#!/bin/sh
gcc -c -fPIC xswrap.c
gcc -shared -fPIC -Wl,-soname,libxswrap.so -o libxswrap.so xswrap.o -lc
sudo cp libxswrap.so /usr/lib
sudo cp xswrap.h /usr/local/include

##</code><code>##

gcc -o test main.c -lxswrap

##</code><code>##

./test