Suppose we have to display a sequence of numbers like from 10 to 20 i.e.
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
without using any for-loop and recursion.
Solution:
Frequently Asked:
We will use two concepts here,
- Constructor
- Static Variable
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Create a Structure with a static member variable i.e. a Counter. Then in this structure’s constructor display the Counter and increment it.
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struct NumberGenerator { static int mCounter; NumberGenerator() { std::cout<<mCounter<<std::endl; mCounter++; } }; int NumberGenerator::mCounter = 10;
Now in the main function just Create 11 Objects of this Structure and hence constructor will be called 10 times.
Inside each constructor call, a static counter will be printed and its value will be incremented.
int main() { NumberGenerator objArr[11]; return 0; }
Thus a sequence of integers will be printed.