向上取整用Math.ceil(double a) 向下取整用Math.floor(double a) // 舉例: double a=35; double b=20; double c = a/b; System.out.println("c===>"+c); //1.75 System.out.println("c===>"+Math.ceil(c)); //2.0 System.out.println(Math.floor(c)); //1.0
向上取整用Math.ceil(double a) 向下取整用Math.floor(double a) // 舉例: double a=35; double b=20; double c = a/b; System.out.println("c===>"+c); //1.75 System.out.println("c===>"+Math.ceil(c)); //2.0 System.out.println(Math.floor(c)); //1.0
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