Heavy-duty operators and conversions-conversions and class types [Part 1]
Introduction:
As mentioned above: A non-explicit constructor that can be called with a real parameter can define an implicit conversion.When an object of the real parameter
Use the atoi, atol, strtodd, strtol, and strtoul functions to implement type conversion.
Atof (converts a string to a float number)Related functionsAtoi, atol, strtodd, strtol, strtoulHeader file# Include Define functionsDouble atof (const char *
JS converts a string to a numeric value in three main ways
Conversion functions, coercion type conversion, the use of JS variable weak type conversion.
1. Conversion function:
JS provides the parseint () and parsefloat () two conversion
I. type conversion
1. Convert to string
ECMAScript's Boolean values, numbers, and string values are interesting because they are pseudo objects, which means they actually have attributes and methods.For example:Js CodeVar sColor = "blue ";Alert
In JavaScript, there are three main conversion methods: Conversion Function, forced type conversion, and weak type conversion using js variables.
1. conversion functions:
Js provides two conversion functions: parseInt () and parseFloat. The former
Atof (convert a string to a float number) atoi (convert a string to an integer number) atol (convert a string to an integer number)
Strtol (convert string to floating point number) strtol (convert string to integer) strtoul (convert string to
1. Conversion function:JS provides two conversion functions for parseint () and parsefloat (). The former converts the value into an integer, which converts the value into a floating-point number. Only these methods are called on the string type,
Convert numbers to Strings1.toString () functionvar num=12345;var s=num.tostring (); function changetostr (num) {return num.tostring ();}2. Using the weak type features of JSvar num=123;var s=num+ "";Convert strings to Numbers1. Conversion
Conversion functions of strings and numbers in VC)
Conversion functions of strings and numbers in VC: atoi, atol, strtodd, strtol, strtoul type conversion
Atoi, atol, strtodd, strtol, and strtoul implement type conversion
Atof (converts a string to
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.