Refer to theory HERE.
Program to Convert Upper Case to Lower Case:
#include <stdio.h>
#include <stdlib.h>
/*
Letter ASCII Binary
---------------------------
A 65 1000001
a 97 1100001
There is a difference of 32. Hence we OR it with 32 to convert the case
*/
int main()
{
char c = 'A';
int x = 32;
c = c | 32;
printf("%c\n", c);
}
Program to Convert Lower Case to Upper Case:
#include <stdio.h>
#include <stdlib.h>
/*
Letter ASCII Binary
---------------------------
a 97 1100001
A 65 1000001
There is a difference of 32. We AND it with ~32 to convert the case
*/
int main()
{
char c = 'a';
int x = 32;
c = c & ~32;
printf("%c\n", c);
}
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