loop_counter.h

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#ifndef LOOP_COUNTER_H
#define LOOP_COUNTER_H

template <int LENGTH>
class LoopCounter
{
public:
    LoopCounter() {
        this->value = 0;
    };

    LoopCounter(int start) {
        this->value = start;
    }

    int val() {
        return this->value;
    }

    void operator++() {
        this->value = (this->value == LENGTH) ? 0 : this->value + 1;
    }

    void operator--(){
        this->value = (this->value == 0) ? (LENGTH - 1) : this->value - 1;
    }

private:
    int value;
};

#endif // !LOOP_COUNTER_H