但是,C++编译器并不提供从int转换成Color的自动转换: 1voidf()2{3Color x;4x = blue;//change x to blue5x =2;//compile-time error: can't convert int to Color6} 若你真的要从int转换成Color,应提供强制类型转换: 1voidf()2{3Color x;4x = red;//
voidf() { Colorx; x=red; // change x to red x=Color(1); // change x to white x=Color(2); // change x to blue x=2; // compile-time error: can't convert int to Color } 但你应保证从int转换来的Color类型有意义。文章标签: C++ 编译器 关键词: C++ int C++ enum C++相互转...
2019-12-21 19:08 − 枚举enum是一种特殊的类(还是类),使用枚举可以很方便的定义常量比如设计一个枚举类型 季节,里面有4种常量 public enum Season { SPRING,SUMMER,AUTUMN,WINTER } 使用枚... 李振明 0 759 一个经典的代码--Convert char to int in C and C++ 2019-12-19 16:03 − ### 前...
void f() { Color x; x = blue; // change x to blue x = 2; // compile-time error: can't convert int to Color } 若你真的要从int转换成Color,应提供强制类型转换: void f() { Color x; x = red; // change x to red x = Color(1); // change x to white x = Color(2); ...
代码如下：class Program { static void Main(string[] args) { double datax = 2356987.2156;//声明double类型datax int datay = Convert.ToInt32(datax);//使用convert关键字进行转换 Console.WriteLine(datay);//输出整型变量datay Console.ReadLine(); } }结果与上例一样：...
austin-web/src/main/java/com/java3y/austin/web/utils/Convert4Amis.java Original file line numberDiff line numberDiff line change @@ -10,6 +10,7 @@ import com.alibaba.fastjson.JSONObject; import com.java3y.austin.common.enums.AnchorState; import com.java3y.austin.common.enums.ChannelType...
sizeof(spring)); // 4 bytes/* Weekday */printf("sizeof Weekday is: %d \n", sizeof(Weekday)); //sizeof Weekday is: 4Weekday today = Saturday;Weekday tomorrow;if(today == Monday)tomorrow = Tuesday;elsetomorrow = (Weekday) (today + 1); //remember to convert from int to ...
tomorrow = (Weekday) (today + 1); //remember to convert from int to Weekday} 六、枚举与#define 宏的区别 下面再看看枚举与#define 宏的区别: 1)#define 宏常量是在预编译阶段进行简单替换。枚举常量则是在编译的时候确定其值。 2)一般在编译器里,可以调试枚举常量,但是不能调试宏常量。 3)枚...
int k; printf("input a number(0--6)"); scanf("%d",&k); day=(enum weekday)k; switch(day) { case sun: printf("sunday/n");break; case mon: printf("monday/n");break; case tue: printf("tuesday/n");break; case wed: printf("wednesday/n");break; ...
int a=34,b=034; 变量a和b相等吗? 答案是不相等的。我们知道,16进制常量以’0x’为前缀,10进制常量不需要前缀,那么8进制呢?它与10进制和16进制表示方法都不相同,它以数字’0’为前缀,这多少有点奇葩:三种进制的表示方法完全不相同。如果8进制也像16进制那样以数字和字母表示前缀的话,或许更有利于减少软件Bu...