产品信息格式化

#include<stdio.h>
int main(void)
{
    int mm, dd, yy, a;
    double b;
    
    printf("Enter item number:\n");
    scanf(" %d", &a);
    printf("Enter unit price:\n");
    scanf(" %lf", &b);
    printf("Enter purchase date (mm/dd/yy):\n");
    scanf(" %d/%d/%d", &mm, &dd, &yy);
    printf("Item Unit Purchase\n""%-9d$ %-9.2f%02d%02d%02d\n", a, b, mm, dd, yy);
    return 0;
}