ภาษา C ติดตรง if เปรียบเทียบค่าตรงกับ japan กับ thailand

#include<stdio.h>
#include <conio.h>

main()
{
      struct product{
       char proname[20],madein[20];
       float proprice;
       int qty;
       }pd1;
      printf(" Please input data   \n");
      printf(" Enter product name    :");
      scanf("%s",&pd1.proname);
      printf(" Enter product made in :");
      scanf("%s",&pd1.madein);
      printf(" Enter product price   :");
      scanf("%f",&pd1.proprice);
      printf(" Enter quantity        :");
      scanf("%d",&pd1.qty);
      printf(" product  %s   \n",pd1.proname);
      printf(" Your product made in  %s  \n",pd1.madein);
      if(pd1.madein.equals("japan")){
                            printf(" Your product  is Grade A \n");
                     }else if(pd1.madein.equals("thailand"))
                     {
                     printf(" Your product  is Grade B \n");
                         }
       if(pd1.qty<=200)
       {
                   printf(" stock : shot supply \n");
                   }
                   else
                   {
                   printf(" stock : normal \n");
                   }

      
      getch();
}