CODY Contest 2020 Basics - Rounding 全10题

第一题 Problem 42641. MATLAB Basic: rounding

Do rounding near to zero

Example: -8.8, answer -8

+8.1 answer 8

 

想0四舍五入，即如果是正值，就向下取整(floor)，如果是负值，就向上取整(ceil)

 

function y = round_zero(x)
    if x<0
        y=ceil(x);
    else
        y=floor(x);
    end
end

 

 

第二题  Problem 42642. MATLAB Basic: rounding II

Do rounding nearest integer.

Example: -8.8, answer -9

+8.1 answer 8

+8.50 answer 9

返回最近整数，直接用round

function y = round_x(x)
    y=round(x);
end

第三题 Problem 42643. MATLAB Basic: rounding III

Do rounding towards minus infinity.

Example: -8.8, answer -9

+8.1 answer 8

+8.50 answer 8

向下取整

function