error C2143: syntax error : missing ‘;’ before ‘type’

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Visual Studio only supports C89. That means that all of your variables must be declared before anything else at the top of a function.

EDIT: @KeithThompson prodded me to add a more technically accurate description (and really just correct where mine is not in one regard). All declarations (of variables or of anything else) must precede all statements within a block.

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