Decimal to Binary

[AbstractionAnon]

What is your question?

Avoid the use of <bits/stdc++.h>. It is not a standard headers. Use the standard headers instead.

PLEASE ALWAYS USE CODE TAGS (the <> formatting button) when posting code.
It makes it easier to read your code and also easier to respond to your post.
http://www.cplusplus.com/articles/jEywvCM9/
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[kigar64551]

What about:

void decimalToBinary(int n)
{
    static const int MSB_MASK = 0x1 << ((sizeof(int) * 8U) - 1U);
    for (size_t i = 0; i < sizeof(int) * 8U; ++i)
    {
        std::cout << ((n & MSB_MASK) ? '1' : '0');
        n <<= 1;
    }
    std::cout << std::endl;
}

...or, without "leading" zeros:

void decimalToBinary2(int n)
{
    static const int MSB_MASK = 0x1 << ((sizeof(int) * 8U) - 1U);
    size_t i = 0;
    for (; !(n & MSB_MASK); ++i)
    {
        n <<= 1;
    }
    for (; i < sizeof(int) * 8U; ++i)
    {
        std::cout << ((n & MSB_MASK) ? '1' : '0');
        n <<= 1;
    }
    std::cout << std::endl;
}