WAP to convert a lower case string to higher case and vice versa

[jithendra.b]

WAP to convert a lower case string to higher case and vice versa
Sample I/P : hello
O/P : HELLO

[jithendra.b]

#include<stdio.h>
int cap_small(char *);
int main()
{
char str[] = "hello";
cap_small(str);
printf("%s\n",str);
}
int cap_small(char *ptr)
{
while(*ptr != '\0')
{
*ptr = *ptr - ('a' - 'A');
*ptr++;
}

}
~

[ajayyadavmca]

may be better and fast.
if you XOR each character one by one by 32. it converts vice versa.
Ex:- char p[]={ChAiR};
while(p)
{
p[i]=p[i]^32;
}