Using return value of cin to take unknown number of inputs in C++

Consider a problem where we need to take an unknown number of integer inputs.

A typical solution is to run a loop and stop when a user enters a particular value. How to do it if we are not allowed to use if-else, switch-case and conditional statement.

The idea is to use the fact that ‘cin >> input’ false if non-numertic value is given. Note that this above approach holds true only when input value’s data type is int (integer).

Important Point : cin is an object if std::istream. In C++11 and later, std::istream has a conversion function explicit bool() const;, meaning that there is a valid conversion from std::istream to bool, but only where explicitly requested. An if or while counts as explicitly requesting a conversion to bool. [Source StackOVerflow]
Before C++ 11, std::istream had a conversion to operator void*() const;

Output:

To stop enter any character
Enter Your Input 1 2 3 s
Total number of inputs entered: 3

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