向上取整:float ceilf(float); double ceil(double);
向下取整:float floorf(float); double floor(double);
四舍五入:float roundf(float); double round(double);
向上取整:float ceilf(float); double ceil(double);
向下取整:float floorf(float); double floor(double);
四舍五入:float roundf(float); double round(double);
本文标题:iOS 向下取整、向上取整、四舍五入
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