text: Stores the length of str
code: int N = str . length ( ) ; for ( int i = 0 ; i < N ; i ++ ) { if ( str [ i ] == ' a ' str [ i ] == ' e ' str [ i ] == ' i ' str [ i ] == ' o ' str [ i ] == ' u ' ) { str [ i ] = str [ i ] - ' a ' + ' A ' ; } } return str ; }