#include <stdio.h>
#include <wctype.h>

char *translations[2] = {
    "tolower",
    "toupper"
};

void main( void )
{
    int     i;
    wint_t  wc = 'A';
    wint_t  twc;

    for( i = 0; i < 2; i++ ) {
        twc = towctrans( wc, wctrans( translations[i] ) );
        printf( "%s(%lc): %lc\n", translations[i], wc, twc );
    }
}