Assigning multiple characters in an int in C language

Consider the following C program.

[sourcecode language=”C”]
#include <stdio.h>
int main(void)
{
int a = ‘d’;

printf("%d\n", a);
/*OUTPUT – 100 (ASCII Code for character d)*/

int b = ‘dd’;
printf("%d", b);
/*OUTPUT – 25700 (Explanation in detail given below)*/

return 0;
}
[/sourcecode]
Output :

100
25700

We can easily guess that the output for ‘d’ is 100 as 100 is ASCII value of character ‘d’.

Let us consider below line

int a = 'dd' 

(%d, a) prints 25700 as output
01100100 01100100 (Binary of 100 100)
Assuming int is of 2 bytes, starting byte is occupied by first character ‘d’ and second byte by second character ‘d’. Therefore overall binary involves 0110010001100100 i.e 2^14 + 2^13 + 2^10 + 2^6 + 2^5 + 2^2 = 25700.

Now guess the output of following code.

[sourcecode language=”C”]
#include <stdio.h>
int main(void)
{
int b = ‘de’;
printf("%d", b);
return 0;
}
[/sourcecode]

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