Change Case of a Word

Q. 101. C++ Program to accept a word and change the Upper case (capital) letters to Lower case (small) and Lower case letters to Upper case.

Copy Code:

#include <iostream>

using namespace std;

int main()

{

  char ch [50]; int i = 0;

  cout << "Enter a Word : ";

  cin >> ch;

  while( ch[ i ] != '\0' )

  {

     if ( ch[ i ] >= 'a'  &&  ch[i] <= 'z' )

         ch [ i ] = ch [ i ] - 32;

     else 

     if ( ch[ i ] >= 'A'  &&  ch[i] <= 'Z' )

         ch [ i ] = ch [ i ] + 32;

     ++i;

   }

  cout << "Word with Changed Case is : "<< ch;

  return 0;

}