Convert an int to ASCII character

Question

I have

int i = 6; 

and I want

char c = '6' 

by conversion. Any simple way to suggest?

EDIT: also i need to generate a random number, and convert to a char, then add a '.txt' and access it in an ifstream.

Answer 1

Straightforward way:

char digits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9' }; char aChar = digits[i]; 

Safer way:

char aChar = '0' + i; 

Generic way:

itoa(i, ...) 

Handy way:

sprintf(myString, "%d", i) 

C++ way: (taken from Dave18 answer)

std::ostringstream oss; oss << 6; 

Boss way:

Joe, write me an int to char converter

Studboss way:

char aChar = '6';

Joe's way:

char aChar = '6'; //int i = 6;

Nasa's way:

//Waiting for reply from satellite...

Alien's way: '9'

//Greetings.

God's way:

Bruh I built this

Peter Pan's way:

char aChar;  switch (i) {   case 0:     aChar = '0';     break;   case 1:     aChar = '1';     break;   case 2:     aChar = '2';     break;   case 3:     aChar = '3';     break;   case 4:     aChar = '4';     break;   case 5:     aChar = '5';     break;   case 6:     aChar = '6';     break;   case 7:     aChar = '7';     break;   case 8:     aChar = '8';     break;   case 9:     aChar = '9';     break;   default:     aChar = '?';     break; } 

Santa Claus's way:

//Wait till Christmas! sleep(457347347); 

Gravity's way:

//What

'6' (Jersey) Mikes'™ way:

//

SO way:

Guys, how do I avoid reading beginner's guide to C++?

My way:

or the highway.

Comment: I've added Handy way and C++ way (to have a complete collection) and I'm saving this as a wiki.

Edit: satisfied?

Answer 2

This will only work for int-digits 0-9, but your question seems to suggest that might be enough.

It works by adding the ASCII value of char '0' to the integer digit.

int i=6; char c = '0'+i;  // now c is '6' 

For example:

'0'+0 = '0' '0'+1 = '1' '0'+2 = '2' '0'+3 = '3' 

Edit

It is unclear what you mean, "work for alphabets"? If you want the 5th letter of the alphabet:

int i=5; char c = 'A'-1 + i; // c is now 'E', the 5th letter. 

Note that because in C/Ascii, A is considered the 0th letter of the alphabet, I do a minus-1 to compensate for the normally understood meaning of 5th letter.

Adjust as appropriate for your specific situation.
(and test-test-test! any code you write)