Edit char array in C, output cut off

Question

First of all, I know that there are a lot of questions about this topic. But I have searched a lot and tested the solutions I found with similar issues but without success.

I want to edit a char array when foo is called and another when bar is called, but the output keeps getting cut off (see below).

main.c

#include "struct.h"

static bool on = true;
static long val = 1;
static char first[15];
static char value[13];
static char second[15];

void foo(void)
{
    strcpy(first, (char*)hello); // first = "Hello "
    LongToStr(val, value);       // value = "1"
    Ltrim(value);
    Rtrim(value);
    strcat(first, value);        // first = "Hello 1"
    strcat(first, (char*)world); // first = "Hello 1 world"

    set(0, first);
}

void bar(void)
{
    on =! on;

    strcpy(second, (char*)fooBar);      // second = "fooBar "

    if (on)
        strcat(second, (char*)OnText);  // second = "fooBar on"
    else
        strcat(second, (char*)OffText); // second = "fooBar off"

    set(1, second);
}

int main()
{
    init();

    foo();
    printf("%s", get(0));

    foo();
    printf("%s", get(0));

    bar();
    printf("%s", get(1));

    bar();
    printf("%s", get(1));
}

struct.c

#include "struct.h"

static myStruct a[2];

void init(void)
{
    a[0].b = hello;
    a[1].b = fooBar;
}

void set(short pos, char* new)
{
    a[pos].b = new;
}

const char* get(short pos)
{
    return a[pos].b;
}

struct.h

void init(void);
void set(short pos, char* new);
const char* get(short pos);

typedef struct {
    const char *b;
} myStruct;

static const char hello[] = "Hello ";
static const char world[] = " world";
static const char fooBar[] = "fooBar ";
static const char OnText[] = "on";
static const char OffText[] = "off";

Output:

1
1
on

Seriously, what am I missing here?

Edit: Documentation of mikroC built-in functions: strcpy Ltrim Rtrim LongToStr strcat

Answer 1

Solved it by not declaring the char arrays as constants (but not sure why).

static char hello[] = "Hello ";
static char world[] = " world";
static char fooBar[] = "fooBar ";
static char OnText[] = "on";
static char OffText[] = "off";