convert alpha to hex

[mofojordan]

How do you convert the ASCII characters to their hexadecimal values?

Such as 'A' is equal 65.

ssprint and sscanf only can convert ints to hexdecimals. And atoi is not a standard C function.

I'm stuck.

[Magos]

Cast the char to an int before using sprintf()

[Dave_Sinkula]

#include <stdio.h>
int main (void)
{
   char ch = 'A';
   printf("ch = '%c'\n", ch);
   printf("ch = %d\n",   (int)ch);
   printf("ch = 0x%x\n", (unsigned int)ch);
   printf("ch = 0%o\n",  (unsigned int)ch);
   return (0);
}
/* my output
ch = 'A'
ch = 65
ch = 0x41
ch = 0101
*/

[Prelude]

>ssprint and sscanf only can convert ints to hexdecimals.
A char is an integral value, in fact, char and int are often used interchangeably in C. Just use the %x format for sprintf and cast the char as unsigned.

>And atoi is not a standard C function.
Yes it is. I believe you are thinking of itoa, which is not a standard function.

-Prelude