Given four files named asiasales2009.txt, europesales2009.txt, africasales2009.txt, latinamericasales2009.txt, define four ofstream objects named asia, europe, africa, and latin, and use them, respectively, to open the four files for writing.

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This is the answer:

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ofstream asia,europe,africa,latin;
asia.open("asiasales2009.txt");
europe.open("europesales2009.txt");
africa.open("africasales2009.txt");
latin.open("africasales2009.txt");

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