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Frequently Asked Questions

How can I convert an integer or a float to a string?

Frequently Asked Questions
It'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);

How do I convert an integer to a string representation?

CSC 209 Summer 2006
Well, printf does it for output, so look at its related function named sprintf that "prints formated output to a string."

How 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)

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

How can I convert from string to int ?

C++ corner
You 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.

How do I convert a std::string to a number?

Miscellaneous technical issues, C++ FAQ Lite
There 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.

How 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.

How do I convert a real number (e.g. 1.0) to an integer (1) format?

ECLiPSe Programming FAQ
Often you'll want to round the real number appropriately first (round/2, floor/2, ceiling/2) rather than relying on fix's truncation. See the documentation for is/2 and fix/2.

How do I convert a string to an int etc?

FAQ for the microsoft.public.languages.csharp newsgroup
In 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.

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.

How do I convert a string to all upper or lower case?

Library Functions
Some 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.

Sect. 18) How do I convert a String to an int?

Java Programmer's FAQ - Part D
There 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" .

Sect. 18) How do I convert an int to a string?

Java Programmer's FAQ - Part D
Try 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.

How do I convert an OCTET STRING value into a readable string?

Scotty Frequently Asked Questions
OCTET 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.

How do you decide which integer type to use?

Infrequently Asked Questions in comp.lang.c
Use ''short'' when you need to avoid values over 32,767, ''int'' when you want to store integers, ''long'' for long numbers (more than 6 digits), and ''float'' for numbers over 4 billion.

Can you float down the rivers?

USDA Forest Service, Pike & San Isabel National Forests,...
There are few areas of the South Platte River that are good floats in our district due to the shallow river depth and/or rapids and there are several areas along the river that are privately owned. By Colorado law, these property owners can restrict access the the portion of the river than runs through their property. For those desiring to float the river it is important that they check the depth and current of the river in the area they choose and be aware of any property restrictions.

What are float variables, anyway?

Infrequently Asked Questions in comp.lang.c
The term ''float variable'' is actually redundant; they are simply variables whose value can ''float'' during execution. For instance: float f, g = 3; f = g; /* f ''floats'' to g */

Subject: 7.39 How do I convert the uname string to the model string?

Here's the relationship for the most common HP-UX machines: Model number on the String returned outside of the box by uname -m ------------------- --------------- default ----------> 9000/800 E25 --------------> 9000/806 E35 --------------> 9000/816 E45 --------------> 9000/826 E55 --------------> 9000/856 F10 --------------> 9000/807 F20 --------------> 9000/817 H20 --------------> 9000/827 K400 -------------> 9000/829 F30 --------------> 9000/837 G30/H30 ---------.

How can I convert?

US to UK Moving FAQ
To have a US item run under UK current you need to buy a transformer, a product that you plug into the wall and has a US-style jack at the other end. The transformer will "step down" in voltage from 240 to 120v. From there you may want to plug in a US-style power strip and provide current for sev eral products. Next you need to consider how many watts your transformer is providing (all transformers should clearly indicate this).

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