PROGRAM
Program to input characters and change theie case.#include<iostream.h>
#include<conio.h>
#include<stdio.h>
int main()
{ char ch;
clrscr();
do
{ cout<<"Enter a character:";
ch=getchar();
if(ch=='\n')
ch=getchar();
cout<<endl;
if(ch>=65&&ch<=90)
ch=ch+32;
else
if(ch>=97&&ch<=122)
ch=ch-32;
putchar(ch);
cout<<endl;
} while(ch!='0');
getch();
return 0;
}
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OUTPUT
Enter a character:R
r
Enter a character:a
A
Enter a character:0
0
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