我想使用PHP计算百分比。我尝试了下面给出的代码，但它给了我float中的返回值。我在[{1}}中不太了解所以请修改此代码。
当前输出
PHP预期的输出
66.666666666667%
66.66%
答案 0 :(得分：2)
使用LIBRARY ieee;
USE ieee.std_logic_1164.ALL;
ENTITY adder_sub32_TB_SHan_53967364 IS
END adder_sub32_TB_SHan_53967364;
ARCHITECTURE behavior OF adder_sub32_TB_SHan_53967364 IS
-- Component Declaration for the Unit Under Test (UUT)
COMPONENT adder_sub32 IS
GENERIC (BW : INTEGER :=32);
PORT ( a_32 : IN STD_LOGIC_VECTOR (BW -1 downto 0);
b_32 : IN STD_LOGIC_VECTOR (BW -1 downto 0);
cin : IN STD_LOGIC ;
sub : IN STD_LOGIC ;
sum_32 : out STD_LOGIC_VECTOR (BW -1 downto 0);
cout : INOUT STD_LOGIC ;
ov : OUT STD_LOGIC ); -- ov stands for overflow
END COMPONENT;
signal a : std_logic_vector(5 downto 0); --:= (others => '0');
signal b : std_logic_vector(5 downto 0); --:= (others => '0');
signal cin : std_logic;
signal sub : std_logic;
signal cout : std_logic;
signal sum_32 : std_logic_vector(5 downto 0);
signal ov : std_logic;
BEGIN
test1: adder_sub32
GENERIC MAP (6)
PORT MAP (a_32 => a,b_32 => b,cin => cin,sub => sub,sum_32 => sum_32,cout => cout,ov => ov);
sub <= '0';
cin <= '0';
a <= "101010";
b <= "110101";
END;
指定小数和分隔符。
number_format()答案 1 :(得分：1)
你可以这样做： echo round（66.666666666667,2）; ＆GT;＆GT; 66.66