CODEWITHSUNDEEP
cfunctiontimecompiler-errors
ohmree
ohmree

Reputation: 375

error: initializer element is not constant (how can I implement this?)

I understand that I'm getting the initializer element is not constant error because I try to assign a call to clock() to a startTime inside Timer and startTime is static (which means it's value can only be something that's known at compile-time).

Here's my code, I need to call (*func) every seconds seconds and am unsure how to implement this, so what would be a good way of doing what I need?

static void Timer(void (*func)(void), int seconds)
{       
        static clock_t startTime = clock();

        if ((startTime - clock() / CLOCKS_PER_SEC) > seconds)
        {
            startTime = clock();
            (*func)();
        }
}

Update

The people who commented suggestted that I do something like this, but if I do this the if at the beginning is redundant:

    static clock_t startTime = (clock_t) -1;

    if (startTime == -1) startTime = clock();
    else if ((startTime - clock() / CLOCKS_PER_SEC) > seconds)
    {
        startTime = clock();
        (*func)();
    }

Upvotes: 0

Views: 780

Answers (1)

Mahonri Moriancumer
Mahonri Moriancumer

Reputation: 6003

static void Timer(void (*func)(void), int seconds)
{       
    static clock_t startTime = 0;

    if(!startTime)
        startTime = clock();

    if ((startTime - clock() / CLOCKS_PER_SEC) > seconds)
    {
        startTime = clock();
        (*func)();
    }
}

Upvotes: 1

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