CODEWITHSUNDEEP
ccastingintegerchar
erogol
erogol

Reputation: 13614

Convertion of integer value to char in C?

I need to convert integer value to char value in C. What is the proper way to do it ?

Regards...

Upvotes: 1

Views: 10745

Answers (3)

Tony Delroy
Tony Delroy

Reputation: 106068

They're implicitly convertible...

int x = 65;
char c = x; // 'A'
putchar(x);
printf("%c", x);
char asciiz[] = { 65, 32, 66, 32, 67, 0 };

You can do it explicitly with e.g. (char)65, especially useful in C++ where overloading and templates make writing code that behaves different depending on the type common.

If you actually mean to get a (possibly multiple-)character representation of a number, then you can use printf("%d", x) to print it to standard output, or:

char buffer[16]; // biggest int is 4 billion so ~10 chars, round up for safety
sprintf(buffer, "%d", x);
// say x was 128, buffer now contains [0] = '1', [1] = '2', [2] = '8', [3] = NUL.

Upvotes: 6

Jörgen Sigvardsson
Jörgen Sigvardsson

Reputation: 4887

If you mean to get the char representation of the integer digits 1, 2, 3, 4, 5, 6, 7, 8, 9 and 0, you can simply do it like this:

char ToChar(int value)
{
   assert(value >= 0 && value <= 9);
   return '0' + value;
}

If you want to include hexadecimal digits into the mix, you can do this:

char ToChar(int value)
{
   assert(value >= 0 && value <= 15);
   return value < 10 ? '0' + value : 'a' + value - 10;
}

This will only work though, if the characters are ordered from '0' to '9' in your character set. I have never heard of a character set that doesn't have this property.

Upvotes: 0

Lindydancer
Lindydancer

Reputation: 26094

The simple answer would be:

(char)my_int;

However, a simple char might not really be what you want. In C, there are ´signed char´, ´unsigned char´, and "plain" char. Unfortunately, it is implementation defined if a plain char is signed or unsigned. So, if you plan to use the down-casts integer in an environment where this matters, make sure to pick the correct char type.

Upvotes: 1

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