[sacdeli]

I am trying to convert uppercase to lower case and vice versa, the program gives me error. This is the code so far:

include <iostream>
using namespace std;
int main()
{
    char ch;
    do
      {  cout <<"\n Enter a character: ";
         ch=getchar();
         if (ch>=65 && ch<=90)       
            ch = ch + 32;            
         else
             if (ch >=97 && ch <= 122)
             ch = ch -32;             
        putchar(ch);
      } while (ch!='0');

    return 0;
}

This post has been edited by macosxnerd101: 17 March 2013 - 04:54 PM
Reason for edit:: Fixed code tags

[CTphpnwb]

Try using #include in place of include.

[baavgai]

Should work in an ASCII domain.

For clarity, though, I'd do something like:

ch = getchar();
if (ch>='A' && ch<='Z') {
	ch = (ch-'A') + 'a';
} else if (ch >='a' && ch <= 'z') {
	ch = (ch-'a') + 'A';
}
putchar(ch);

Of course, there are already functions for this: islower, isupper, tolower, toupper.