How do I convert a std::string to a number?
Miscellaneous technical issues, C++ FAQ LiteThere are two easy ways to do this: you can use the <cstdio> facilities or the <iostream> library. In general, you should prefer the <iostream> library.
Related QuestionsHow do I convert a string to a number?
Updating the For Beginners forum FAQ - GameDev.Net Discussio...I am including the header file <string>, and I am using the string class, but the code doesn't compile? (namespace resolution, having the std:: topics) How do I use unique() with vectors? (answered only once, but still a good question to have due to people not knowing that it's possible to do)
Related QuestionsAKAAS :: C Interview Questions and Answers | C Frequently As...The standard C library provides several functions for converting strings to numbers of all formats (integers, longs, floats, and so on) and vice versa. strtod() Converts a string to a double-precision floating-point value and reports any “leftover” numbers that could not be converted. strtol() Converts a string to a long integer and reports any “leftover” numbers that could not be converted.Related Questions
How to convert a string to a number using JavaScript?
AKAAS :: JavaScript Interview Questions and Answers | JavaSc...You can use the parseInt() and parseFloat() methods. Notice that extra letters following a valid number are ignored, which is kinda wierd but convenient at times.
Related QuestionsWhy does 1+1 equal 11? or How do I convert a string to a number?
comp.lang.javascript FAQ - 9.91 - 2008-01-19Javascript variables are loosely typed: the conversion between a string and a number happens automatically. Since plus (+) is also used as in string concatenation, '1' + 1 is equal to '11' : the String deciding what + does. To overcome this, first convert the string to a number. For example: +varname or Number(varname) or parseInt(varname, 10) or parseFloat(varname) . Prompt and form control values are strings, as is the result from a prompt window.
Related QuestionsCan I get an STD more than once?
FAQYou are not "immune" to an STD if you have had it before. STDs caused by bacteria (chlamydia, gonorrhea, and syphilis) can be treated and cured, but you can get them again if exposed. Viral STDs cannot be cured and may remain in your body forever. Home | About Us | Get Involved | Programs | Contact Us | News | Events | FAQ | Intranet | Calendar | Links | Site Map | Guestbook | Photo Gallery |
Related QuestionsinSPOT LA ·> Frequently Asked QuestionsAnswer: You are not "immune" to an STD if you have had it before. STDs caused by bacteria (chlamydia, gonorrhea, and syphilis) can be treated and cured, but you can get them again if exposed. Viral STDs cannot be cured and may remain in your body forever.Related Questions
How to convert the datetime into a string for use in the SQL ' statement?
Megasolutions.net :: Asp.Net Frequently Asked Questions - FA...Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Private Sub ddlCulture_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ddlCulture.SelectedIndexChanged
Related QuestionsHow do I convert an integer to a string representation?
CSC 209 Summer 2006Well, printf does it for output, so look at its related function named sprintf that "prints formated output to a string."
Related QuestionsHow can I convert an integer or a float to a string?
Frequently Asked QuestionsIt's easy. Use sprintf. For example: char string1[50]; char string2[50]; short int var1; float var2; ... sprintf (string1, "%d", var1); sprintf (string2, "%f", var2);
Related QuestionsHow can I convert from string to int ?
C++ cornerYou want to make a function that converts from a type to another. Like from std::string to int, or the other way around. This can be done using std::stringstream and insertion / extraction operators. Just as above, templates will prove of great help: Its usage is not as straightforward as the above explained max template. Normally, you would want to call it like "int value = lexical_cast( myStdString );". There is, however, a problem.
Related QuestionsHow do I convert a string into an internet address?
Programming UNIX Sockets in C - Frequently Asked Questions: ...If you are reading a host's address from the command line, you may not know if you have an aaa.bbb.ccc.ddd style address, or a host.domain.com style address. What I do with these, is first try to use it as a aaa.bbb.ccc.ddd type address, and if that fails, then do a name lookup on it. Here is an example: Converts ascii text to in_addr struct. NULL is returned if the address can not be found.
Related QuestionsHow do I convert from int to string?
FAQ - CPPConverting from int to string is a little more complicated than converting a string to int. There are no standard C++ functions for this, but there is a way to do it using standard stringstreams. The class stringstream is declared in header sstream and is used like this: std::stringstream ss; std::string str; ss << 31337; ss >> str;
Related QuestionsHow do you convert degrees, minutes, and seconds to and from a decimal number?
DCP: Frequently Asked QuestionsExample: To convert 49 degrees 30 minutes and 45 seconds to decimal degrees: dn = 49 + 30/60 + 45/3600 = 49.5125 Note that int(n) denotes taking the integer part of a number (e.g. int(49.5125) = 49) and frac its fractional part (e.g. frac(49.5125) = 0.5125). mi is an intermediate result. Example: To convert 49.5125 decimal degrees to degrees, minutes and seconds: d = int(49.5125) = 49 mi= frac(49.5125)*60 = 0.5125*60 = 30.75 m = int(mi) = int(30.75) = 30 s = frac(mi)*60 = 0.
Related QuestionsHow do I convert a string to an int etc?
FAQ for the microsoft.public.languages.csharp newsgroupIn general, when you want to convert from one type to another, the first class to look at is System.Convert. It has a load of static methods which are likely to help you. If you're converting from a String, you could also check whether the type that you want to convert to has a Parse method or something similar - for instance, I usually use DateTime.ParseExact to convert from a String to a DateTime.
Related QuestionsQ. How do I convert from string to int?
C++ FAQs - GeneralThe simplest way is to use the function int std::atoi(const char*) declared in cstdlib. For example, std::atoi("31337") returns 31337. Alternatively, you can use std::strtol() or std::strtoul(). These functions provide more functionality such as the ability to convert hexadecimal or octal number strings, and are also declared in cstdlib.
Related QuestionsQ. How do I convert from int to string?
C++ FAQs - GeneralConverting from int to string is a little more complicated than converting a string to int. There are no standard C++ functions for this, but there is a way to do it using standard stringstreams. The class stringstream is declared in header sstream and is used like this:
Related QuestionsHow do I convert a string to all upper or lower case?
Library FunctionsSome libraries have routines strupr and strlwr or strupper and strlower, but these are not Standard or portable. It's a straightforward exercise to write upper/lower-case functions in terms of the toupper and tolower macros in <ctype.h>; see also question 13.5. (The only tricky part is that the function will either have to modify the string in-place or deal with the problem of returning a new string; see question 7.5a.
Related QuestionsSect. 18) How do I convert a String to an int?
Java Programmer's FAQ - Part DThere are several ways. The most straightforward is: String myString = numString.trim(); int i = Integer.parseInt(myString); long l = Long.parseLong(myString) or String myString = numString.trim(); i = Integer.parseInt(myString,myIntRadix); Note 1: There is a gotcha with parseInt - it will throw a NumberFormatException for String values in the range "80000000" to "ffffffff". You might expect it to interpret them as negative, but it does not. The values have to be "-80000000" .
Related QuestionsSect. 18) How do I convert an int to a string?
Java Programmer's FAQ - Part DTry any of these: String s = String.valueOf(i); or String s = Integer.toString(i); or String s = Integer.toString(i, radix); or // briefer but may result in extra object allocation. String s = "" + i; Note: There are similar classes for Double, Float, Long, etc.
Related QuestionsHow do I convert an OCTET STRING value into a readable string?
Scotty Frequently Asked QuestionsOCTET STRING value like 73:63:6f:74:74:79 can be converted into a readable string (DisplayString) by formatting it according to the DisplayString textual convention.
Related QuestionsWhat should I do if I think I have an STD?
FAQIf you think you have an STD, see a health care provider immediately. Seeking treatment early will help to minimize the long-term effects of most STDs. Avoid sexual contact until you are cured.
Related QuestionsHow can I get an STD test?
FAQ: Birth Control Venereal Disease Information CentreThere is no single test that can check for all STDs. We offer tests for gonorrhea, chlamydia, syphilis, hepatitis B, vaginal infections, genital herpes, as well as Pap tests for cervical cancer, on a confidential basis.
Related QuestionsWhat happens if I have an STD?
FAQ: Birth Control Venereal Disease Information CentreWe offer free treatment for gonorrhea, chlamydia and some vaginal infections. We also offer counselling on managing the infection and how to tell partners, if necessary.
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