4.8.2 While °j°é
while °j°é¬O¥Î¦b·íº¡¨¬¬Y¨Ç±ø¥ó«h«½Æ°õ¦æªººâ¦¡¡A¥¦ªºµ²ºc¦p¤U¡G
while expression
command group A
end
¨Ò¦p¡G
sum = 0;
k = 1;
while x(k) >= 0 & k <= length(k)
sum = sum + x(k);
k = k+1;
end
¶·ª`·Nªº¬O¦b³]©w±ø¥ó®Én¦Ò¼{¶g¥þ¡A§_«h·|²£¥ÍµLªkµ²§ôªº°j°é¡C
¦¹¥~ÁÙ¦³¤@Ó break ªº«ü¥O¡A¬O¥Î¨Ó¸õ¥X°j°é¡A¥i¥H¥Î¦b¤Wzªº for, while ªºµ²ºc¤¤¡C¨Ò¦p¡G
>> num=0; EPS=1; % ³oÓ¨Ò¤l¬O§ä¥XMATLAB¥ipºâ¨ì³Ì¤pªº¥¿È
>> for num=1:1000 % EPS±q1pºâ°_¡A¹w³]npºâ¦¸¼Ænum¬° 1000
EPS=EPS/2; % ¨C¦¸±NEPS´î¤Ö¤@¥b
if (1+EPS) <= 1 % pºâ¨ì³Ì«áª½¨ìEPS¤Ó¤p¨Ï±o 1+EPS ¤p©óµ¥©ó 1
break % ¦pªGº¡¨¬¤Wz±ø¥ó§Y¸õ¥X°j°é
end
end
>> EPS, num
>> EPS =
1.1102e-016
>> num =
53
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