#include <stdio.h> #include <stdlib.h> #include <string.h> void flush() { int a; while ((a=getchar()) !='\n' && a != EOF); }

int main() { FILE *aco,*dco; char more,option;

struct code{
    char code[80];
    char product_name[40];
    int manufacture_date;
    int expiry_date;
};

struct code p;

char product_name[40];

long int codelist;

aco=fopen("code.txt","rb+");
if (aco== NULL);{
aco=fopen("code.txt","wb+");
    if(aco== NULL) {
    printf("no file is there !");
    exit(1);
}

}

printf("////////////welcome to store////////////\n"); printf("////////here you will get all the information about product///////\n"); printf("/////////below are the options choose one!////////////\n");

codelist= sizeof(p); while(1){ printf("a]add information\n"); printf("b]display code\n"); printf("c]delete information\n"); printf("d]close\n"); printf("choose one\n"); fflush(stdin); scanf("\n%c", &option); switch(option) { case 'a': fseek(aco,0,SEEK_END); more='o'; while(more=='o'){ flush(); printf("\nnew code:"); fgets(p.code,80,stdin); printf("\nProduct name: "); fgets(p.product_name,40,stdin); printf("\nmanufacture date:"); scanf("%d",&p.manufacture_date); printf("\nexpiry date: "); scanf("%d",&p.expiry_date);

         fwrite(&p,codelist,1,aco);
         printf("\nadd one more or exit(o/e)");
         fflush(stdin);
         scanf("\n%c", &more);
     }
     break;
     case 'b':
     rewind(aco);
     while(fread(&p,codelist,1,aco)==1){
         printf("\n%s %s %d %d\n",p.code,p.product_name,p.manufacture_date,p.expiry_date);
     }
     break;
     case 'c':
     more='o';
     while (more=='o'){
         flush();
         printf("delete code:");
         fgets(product_name,80,stdin);
         dco=fopen("code1.txt","wb");
         rewind(aco);
         while (fread(&p,codelist,1,aco)==1){
             if(strcmp(p.code,product_name)!=0){
                 fwrite(&p,codelist,1,dco);
             }
         }
         fclose(aco);
         fclose(dco);
         remove("code,txt");
         rename("code1.txt","code,txt");
         aco=fopen("code.txt","rb+");
         printf("delete another record(o/e)");
         fflush(stdin);
         scanf("\n%c",&more);
     }
     break;
     case 'd':
     fclose(aco);
     exit(0);
}

} return 0; }