If my student visa be refuse for UK, do I enjoy to apply for a visa every time I want to enter UK??

If my student visa was refused for UK, do I have to apply for a visa every time I want to enter UK, even though I don't requirement a visa as I'm a Croatian citizen & Croats DON"T need visas??
Answers:   
IGS - International graduate scheme
IGS allows non - EEA graduates who completed and acquire a degree, Master's degree, PhD or postgraduate diploma or certificate on or after 1st May 2007 to work surrounded by the UK for up to one year.
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