intmax

Matlab中intmax簡介

函式功能： 返回指定整數類型所能表示的最大值。

調用格式：

v = intmax

返回matlab中32位正整數所能表示的正的最大值。

v = intmax('classname')

返回指定的整數類型所能表示的正的最大值。'classname'可以是：

'int8'、'int16'、'int32'、'int64'、'uint8'、'uint16'、'uint32'、'uint64'。

相關函式： intmin

程式示例

close all; clear; clc;

type_cell{1} = 'int';

type_cell{2} = 'uint';

bits = [8, 16, 32, 64];

for m = 1:2

for k = 1:4

type_str = strcat(type_cell{m}, num2str(bits(k)));

fprintf('The largest positive number ''%s'' can store is %s\n', ...

type_str, num2str(intmax(type_str)));

end

end

運行結果

The largest positive number 'int8' can store is 127

The largest positive number 'int16' can store is 32767

The largest positive number 'int32' can store is 2147483647

The largest positive number 'int64' can store is 9223372036854775800

The largest positive number 'uint8' can store is 255

The largest positive number 'uint16' can store is 65535

The largest positive number 'uint32' can store is 4294967295

The largest positive number 'uint64' can store is 18446744073709552000

上面這個程式列印出了matlab中各種整數類型所能表示的最大值。