cppTwoSameDigitsCounter

#include <iostream>

int main()
{
    const int firstNumber{ 100 };
    const int lastNumber{ 999 };
    int countNumber{ 0 };
    int num{ firstNumber };
    int numCopy{ 0 };
    int d1{0};
    int d2{0};
    int d3{0};

    while (num <= lastNumber)
    {
        numCopy = num++;

        d1 = numCopy % 10;
        numCopy /= 10;

        d2 = numCopy % 10;
        numCopy /= 10;

        d3 = numCopy % 10;

        countNumber += (d1 == d2 or d1 == d3 or d2 == d3);
    }

    std::cout << "Quantity of intregers that contains at leas 2 same numbers is " << countNumber << '\n';
}