Question!

[blitzz05]

How do you convert lower case letters to upper case and vice versa?
in a string.

example;
Type a string: final ExaM is appRoaCHing
Reversed case: FINAL eXAm IS APPrOAchING

[giblit]

You can increase/decrease the character or you can use the toupper/tolower functions.

[anup30]

#include <iostream>
#include <cctype>
#include <string>
using namespace std;

int main()
{
	
	string s = "final ExaM is appRoaCHing";

	for(auto &x: s)
	{ isupper(x) ? x=tolower(x) : x=toupper(x); }
	
	cout << s;
}

[LB]

http://stackoverflow.com/a/313990/1959975

Or, for UTF-8,
http://www.boost.org/doc/libs/1_57_0/libs/locale/doc/html/conversions.html

[blitzz05]

@anup30
What does ? mean? in line 12

[TarikNeaj]

@blitzz I think its another way of doing if statements, never done it that way myself though. I think it says

if (isupper(x))
{
    x = tolower(x);
}
else
{
   x=toupper(x);
}

Although Im not 100% sure

[anup30]

What does ? mean? in line 12

conditional operator: http://www.cplusplus.com/doc/tutorial/operators/