1¡£4 Ô¤¶¨ÒåÀàÐÍ£¨Predefined types£©

c#ÌṩÁËһϵÁÐÔ¤¶¨ÒåÀàÐÍ¡£ËüÃÇÓëc/c++Óв»ÉÙÏàËƵĵط½¡£Ô¤¶¨ÒåÒýÓÃÀàÐÍÓÐobjectºÍstring¡£
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ÔÚc#ÖÐfalse²»µÈÓÚ0£¬trueÒ²²»µÈÓÚ1£»falseºÍtrue¶¼Êǵ¥¶À·ÖÀë³öÀ´µÄÒ»¸öÖµ¡£Ñ§¹ýc/c++µÄÍøÓÑ
¶¼ÖªµÀ£º*/
int i = 0;
if (i = 0) { // Bug: Ó¦¸ÃÊÇ (i == 0)
....
}
/* ÊÇûÓÐÎÊÌâµÄ¡£µ«ÔÚc#ÖлáÒý·¢Ò»¸ö±àÒë´íÎó£¨error CS0029: Cannot implicitly convert
type 'int' to 'bool'£©¡£µ±È»£¬ÕâÑùÎþÉüÁËÒ»µãûÓбØÒªµÄÁé»îÐÔ¡£ÎÒÃÇÔÙÒ²²»ÄÜÕâÑù£º*/
string str;
....
if(str = Console.ReadLine()) {
Console.WriteLine("Your comments are: {0}",str);
....
/* ¶ø±ØÐ룺*/
using System;
class BoolTest
{
static void Main() {
string str = Console.ReadLine();//Ò²¿ÉÒÔ£ºstring str;
if(str == "") // if((str = Console.ReadLine()) == "")
Console.WriteLine("i can't read your comments. Please tell me something! O.K.?");
else
Console.WriteLine("Your comments are: {0}",str);
}
}
/*
Î