Как преобразовать число в символ c

Преобразовать int в char в C#

В этом посте будет обсуждаться, как преобразовать int в char в C#.

1. Явное преобразование (приведения)

C# не поддерживает неявное преобразование типа "int" в "char", поскольку это преобразование небезопасно для типов и может привести к потенциальной потере данных. Однако мы можем сделать явное преобразование с помощью оператора приведения () . Приведение информирует компилятор о том, что преобразование является преднамеренным.

Следующая программа преобразует значение целого числа в значение типа Char.

Convert Integer to Char in C

This tutorial introduces how to convert an integer value into a character value in C. Each character has an ASCII code, so it’s already a number in C. If you want to convert an integer to a character, simply add ‘0’ .

Add ‘0’ to Convert an int to char

The ‘0’ has an ASCII value of 48. so, we have to add its value to the integer value to convert it into the desired character. The program is as below:

Below is a program that will convert an integer to the character only between 0 to 9.

Another program to convert an integer value to a character is as below:

Assign an int Value to char Value

Another way to convert an integer value to a character value is to assign an integer value to a character value as below: The character value corresponding to an integer value is printed here.

Below is another way to convert an integer value to a character value. Here, the value is typecasted, so the value 67 gets converted into the corresponding ASCII value.

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sprintf() Function to Convert an Int to a Char

The sprintf() function works the same as the printf() function but instead of sending output to console, it returns the formatted string.

The first argument to the sprintf() function is a pointer to the target string. The remaining arguments are the same as for the printf() function.

Syntax of sprintf()

• strValue is a pointer to the char data type.
• format is used to display the type of output along with the placeholder.
• [arg1,arg2. ] are the integer(s) to be converted.

The function writes the data in the string pointed to by strValue and returns the number of characters written to strValue , excluding the null character. The return value is generally discarded. If any error occurs during the operation, it returns -1 . The program to convert an integer to a character is as below:

Как преобразовать число в символ c

In this article, we will learn how to convert int to char in C++. For this conversion, there are 5 ways as follows:

1. Using typecasting.
2. Using static_cast.
3. Using sprintf().
4. Using to_string() and c_str().
5. Using stringstream.

Let’s start by discussing each of these methods in detail.

Examples:

Input: N = 65
Output: A

Input: N = 97
Output: a

1. Using Typecasting

Method 1:

1. Declaration and initialization: To begin, we will declare and initialize our integer with the value to be converted.
2. Typecasting: It is a technique for transforming one data type into another. We are typecasting integer N and saving its value in the data type char variable c.
3. Print the character: Finally, print the character using cout.

Below is the C++ program to convert int to char using typecasting:

The time complexity is O(1) and an auxiliary space is O(1).

Method 2:

1. Declaration and initialization: To begin, we will declare and initialize our integer with the value to be converted.
2. Typecasting: Declare another variable as character c and assign the value of N to the C
3. Print the character: Finally, print the character using cout.

Below is the C++ program to convert int to char using typecasting:

2. Using static_cast

The integer can be converted to a character using the static_cast function. Below is the C++ program to convert int to char using static_cast:

3. Using sprintf()

Allot space for a single int variable that will be converted into a char buffer. It is worth noting that the following example defines the maximum length Max_Digits for integer data. Because the sprintf function sends a char string terminating with 0 bytes to the destination, we add sizeof(char) to get the char buffer length. As a result, we must ensure that enough space is set aside for this buffer.

Below is the C++ program to convert int to char using sprintf():

4. Using to_string() and c_str()

The to string() function transforms a single integer variable or other data types into a string. The c_str() method converts a string to an array of characters, terminating with a null character.

Below is the C++ program to convert int to char using to_string() and c_str():

5. Using stringstream

A stringstream connects a string object to a stream, allowing you to read from it as if it were a stream (like cin). Stringstream requires the inclusion of the sstream header file. The stringstream class comes in handy when processing input.

Below is the C++ program to convert int to char using stringstream:

Method: Converting int value to char by adding 0

Time complexity: O(1).
Auxiliary space: O(1).

Converting int to char in C

Right now I am trying to convert an int to a char in C programming. After doing research, I found that I should be able to do it like this:

What I would like is for this to return ‘A’ (and for 0-9 to return ‘0’-‘9’) but this returns a new line character I think. My whole function looks like this:

9 Answers 9

to convert int to char you do not have to do anything

only one int to char value as the printable (usually ASCII) digit like in your example:

if you want to convert to the string (char *) then you need to use any of the stansdard functions like sprintf, itoa, ltoa, utoa, ultoa . or write one yourself:

A portable way of doing this would be to define a

where . are the rest of the characters that you want to consider.

Then and foo[value] will evaluate to a particular char . For example foo[0] will be ‘0’ , and foo[10] will be ‘A’ .

If you assume a particular encoding (such as the common but by no means ubiquitous ASCII) then your code is not strictly portable.

Characters use an encoding (typically ASCII) to map numbers to a particular character. The codes for the characters ‘0’ to ‘9’ are consecutive, so for values less than 10 you add the value to the character constant ‘0’ . For values 10 or more, you add the value minus 10 to the character constant ‘A’ :

I take it that OP wants more that just a 1 digit conversion as radix was supplied.

To convert an int into a string, (not just 1 char ) there is the sprintf(buf, «%d», value) approach.

To do so to any radix, string management becomes an issue as well as dealing the corner case of INT_MIN

The following C99 solution returns a char* whose lifetime is valid to the end of the block. It does so by providing a compound literal via the macro.

Sample usage and tests

The values stored in a char are interpreted as the characters corresponding to that table. The value of 10 is a newline

So characters in C are based on ASCII (or UTF-8 which is backwards-compatible with ascii codes). This means that under the hood, «A» is actually the number «65» (except in binary rather than decimal). All a «char» is in C is an integer with enough bytes to represent every ASCII character. If you want to convert an int to a char , you’ll need to instruct the computer to interpret the bytes of an int as ASCII values — and it’s been a while since I’ve done C, but I believe the compiler will complain since char holds fewer bytes than int . This means we need a function, as you’ve written. Thus,

will be what you want to return from your function. Keep your bounds checks with «radix» as you’ve done, imho that is good practice in C.