CODEWITHSUNDEEP
c++arduino
user613326
user613326

Reputation: 2180

How to convert an ASCII char to its ASCII int value?

I would like to convert a char to its ASCII int value.

I could fill an array with all possible values and compare to that, but it doesn't seems right to me. I would like something like

char mychar = "k"
public int ASCItranslate(char c)
return c   

ASCItranslate(k) // >> Should return 107 as that is the ASCII value of 'k'.

The point is atoi() won't work here as it is for readable numbers only.

It won't do anything with spaces (ASCII 32).

Upvotes: 15

Views: 140526

Answers (7)

gthorn
gthorn

Reputation: 1

Just typecast it to integer type that will automatically convert it to it's corresponding ASCII value.

#include <iostream>
using namespace std;
char c = 'a';
printf("%d",int(c));

Upvotes: 0

Pete Becker
Pete Becker

Reputation: 76488

#include <iostream>

char mychar = 'k';
int ASCIItranslate(char ch) {
    return ch;
}

int main() {
    std::cout << ASCIItranslate(mychar);
    return 0;
}

That's your original code with the various syntax errors fixed. Assuming you're using a compiler that uses ASCII (which is pretty much every one these days), it works. Why do you think it's wrong?

Upvotes: 0

Waqar
Waqar

Reputation: 9376

Do this:-

char mychar = 'k';
//and then
int k = (int)mychar;

Upvotes: 1

Linkon
Linkon

Reputation: 1168

To Convert from an ASCII character to it's ASCII value:

  char c='A';
    cout<<int(c);

To Convert from an ASCII Value to it's ASCII Character:

int a=67;
  cout<<char(a);

Upvotes: 1

Tisys
Tisys

Reputation: 948

In C++, you could also use static_cast<int>(k) to make the conversion explicit.

Upvotes: 5

Jack
Jack

Reputation: 133629

A char is already a number. It doesn't require any conversion since the ASCII is just a mapping from numbers to character representation.

You could use it directly as a number if you wish, or cast it.

Upvotes: 8

John Zwinck
John Zwinck

Reputation: 249592

Just do this:

int(k)

You're just converting the char to an int directly here, no need for a function call.

Upvotes: 24

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