请问错误在哪里不胜感激 c小白

Question

#include
#include
int main(void)
{
char name[20];
int width;
printf("please write your name:\n");
scanf("%s",name);
printf("name:/"%s/".\n",name);
printf("name:/"%20s/".\n",name);
printf("name:/"%-20s/".\n",name);
width=strlen(name);
printf("name:/"%*s/".\n",width+3,name);
return 0;
}

Answer 1

width + 3的输出应该前面有一个 %d 吧？