如何将变量类型简写
如:
(c++)
long long=>ll
double=>d
string=>str
如何将变量类型简写
如:
(c++)
long long=>ll
double=>d
string=>str
以下回复参考:皆我百晓生、券券喵儿等免费微信小程序作答:
在C++中,你可以使用类型别名(typedef)或者使用using
关键字来为复杂的数据类型创建简短的别名。以下是如何为long long
、double
和string
创建简写的例子:
#include <iostream>
#include <string>
// 使用typedef定义别名
typedef long long ll;
typedef double d;
typedef std::string str;
int main() {
ll myLongLong = 123456789012345LL;
d myDouble = 3.14159;
str myString = "Hello, world!";
std::cout << "myLongLong: " << myLongLong << std::endl;
std::cout << "myDouble: " << myDouble << std::endl;
std::cout << "myString: " << myString << std::endl;
return 0;
}
或者使用using
关键字:
#include <iostream>
#include <string>
// 使用using定义别名
using ll = long long;
using d = double;
using str = std::string;
int main() {
ll myLongLong = 123456789012345LL;
d myDouble = 3.14159;
str myString = "Hello, world!";
std::cout << "myLongLong: " << myLongLong << std::endl;
std::cout << "myDouble: " << myDouble << std::endl;
std::cout << "myString: " << myString << std::endl;
return 0;
}
这两种方法都可以让你在代码中使用简短的类型别名,使代码更简洁易读。