使用％u或％lu说明符

#include <stdio.h>
#include <string.h>      /* provides strlen() prototype */

#define PRAISE this is a test test test test.

int main(void)
{
    char name[40];

    printf(What's your name? );
    scanf(%s, name);
    printf(Hello, %s. %s\n, name, PRAISE);
    printf(Your name of %zd letters occupies %zd memory cells.\n, strlen(name), sizeof name);
    printf(It has %zd letters , strlen(PRAISE));
    printf(and occupies %zd memory cells.\n, sizeof PRAISE);

    return 0;
}