โปรแกรมร้านโทรศัพท์ ภาษา C

#include<stdio.h>
#include<conio.h>
#include<string.h>
void Adddata();
void Sell();
void Show();
struct phonedata
{
char id[20];
char brand[10];
char series [10];
char colour [10];
int price;
int num;
struct size
{
float width;
float height;
float lengt;
} s;
struct properties
{
char camera [5];
char wifi [5];
} p;
struct memory
{
char inside [10];
char card [10];
} m;
int amount;
} ph;

//----------------------------------------------------------------------------

int main()
{
int n;
do
{
printf("\t<<===========================================>>\n");
printf("\t<< Welcome to the shop selling mobile phones.>>\n");
printf("\t<<------------------------------------------->>\n");
printf("\t<< Please choose to >>\n");
printf("\t<<------------------------------------------->>\n");
printf("\t<< 1 = Add 3 = Show >>\n");
printf("\t<< 2 = Sell 0 = Exit >>\n");
printf("\t<<===========================================>>\n");
printf("\n\tEnter your choose : ");
scanf("%d",&n);
printf("\n\n");

if(n==1){
Adddata();
}else if(n==2){
Sell();
}else if(n==3){
Show();
}
}
while(n!=0);
return 0;
}

//----------------------------------------------------------------------------

void Adddata()
{
FILE *fp;
int n=0;
int choose;
char stock[20];
printf("\t1.Add new phone\n\t2.Update Stock\n");
printf("\tEnter you choose : ");
scanf("%d",&choose);
if(choose==1)
{
fp=fopen("D://phone2.txt","a");
if(fp==NULL)
{
printf("errer open file\n");
}
else
{
do
{
printf("\tinput id: "); scanf("%s",ph.id);
printf("\tinput brand: "); scanf("%s",ph.brand);
printf("\tinput series: "); scanf("%s",ph.series);
printf("\tinput colour: "); scanf("%s",ph.colour);
printf("\tinput price: "); scanf("%d",&ph.price);
printf("\tinput width: "); scanf("%f",&ph.s.width);
printf("\tinput height: "); scanf("%f",&ph.s.height);
printf("\tinput length: "); scanf("%f",&ph.s.lengt);
printf("\tinput camera: "); scanf("%s",ph.p.camera);
printf("\tinput wifi: "); scanf("%s",ph.p.wifi);
printf("\tinput inside: "); scanf("%s",ph.m.inside);
printf("\tinput card: "); scanf("%s",ph.m.card );
ph.amount =1;
// fprintf(fp,"%s %s %s %s %d %f %f %f %s %s %s %s %d\n",ph.id,ph.brand,ph.series,ph.colour,ph.price,
// ph.s.width,ph.s.height,ph.s.lengt,ph.p.camera,ph.p.wifi,ph.m.inside,ph.m.card,ph.amount);
fwrite(&ph,1,sizeof(ph),fp);
printf("\n\tContinue enter 1 exit 2 ... ");
scanf("%d",&n);
}while(n==1);
fclose(fp);
}
}
else
{
fp=fopen("D://phone2.txt","r+");
if(fp==NULL)
{
printf("errer open file\n");
}
else
{
printf("\n\tInput ID : ");
scanf("%s",stock);
do
{
if(strcmp(stock,ph.id)==0)
{
ph.amount=ph.amount+1;
printf("\t%d",ph.amount);
printf("\n\n\t!!! Update Successful !!!\n");
}
}while(fread(&ph, sizeof(ph),1,fp) == 1);
rewind(fp);
}
printf("\n\n");
fclose(fp);
}
}

//----------------------------------------------------------------------------

void Sell()
{
FILE *fp;
char name[10],series[10],confirm[5];
int con,product;
fp=fopen("D://phone2.txt","r+t");
do
{
printf("\tEnter name phone : ");
scanf("%s",name);
printf("\tEnter Series : ");
scanf("%s",series);
while(!feof(fp))
{
fscanf(fp,"%s %s %s %s %d %f %f %f %s %s %s %s %d\n",ph.id,ph.brand,ph.series,ph.colour,&ph.price,
&ph.s.width,&ph.s.height,&ph.s.lengt,ph.p.camera,ph.p.wifi,ph.m.inside,ph.m.card,&ph.amount);
if((strcmp(name,ph.brand)==0)&&(strcmp(series,ph.series)==0))
{
printf("\n\n");
printf(" ========================================================================\n");
printf(" BRAND SERIES PRICE COLOUR CAMERA WIFI SIZEMEMORY\n");
printf(" ========================================================================\n");
printf("\n %8s%10s%9d%10s%10s%7s%12s\n\n\n",ph.brand,ph.series,ph.price,ph.colour,ph.p.camera,ph.p.wifi,ph.m.card);

printf("\tDo you want to buy this product\n\t1.Buy\n\t2.No... ");
scanf("%d",&product);
printf("\n");
if(product==1)
{
printf("\n\tYou total pay %6d Bath\n\n",ph.price);
printf("\tConfirm [Y/N] : ");
scanf("%s",confirm);
if(strcmp("y",confirm)==0)
{
ph.amount=ph.amount-1;
printf("%d",ph.amount);
printf("\n\tSucessful !!!\n\n");
fprintf(fp,"%s %s %s %s %d %f %f %f %s %s %s %s %d\n",ph.id,ph.brand,ph.series,ph.colour,ph.price,
ph.s.width,ph.s.height,ph.s.lengt,ph.p.camera,ph.p.wifi,ph.m.inside,ph.m.card,ph.amount);
}
else
{
break;
}
getch();
break;
}
else
{
break;
}
}
}
rewind(fp);
printf("\tContinue enter 1 exit 2 ... ");
scanf("%d",&con);
printf("\n");
}
while(con==1);
fclose(fp);
}

//----------------------------------------------------------------------------

void Show()
{
FILE *fp;
fp=fopen("D://phone2.txt","r");
if(fp==NULL)
{
printf("\t\t\tError open file!!!\n\n");
}
else
{
printf("\n\n");
printf("\n ****** Welcome to the shop selling mobile phones******\n\n ");
printf("\t ==============================================\n");
printf("\t BRAND SERIES PRICE AMOUNT\n");
printf("\t ==============================================\n");

while(!feof(fp))
{
fscanf(fp,"%s %s %s %s %d %f %f %f %s %s %s %s %d\n",ph.id,ph.brand,ph.series,ph.colour,&ph.price,
&ph.s.width,&ph.s.height,&ph.s.lengt,ph.p.camera,ph.p.wifi,ph.m.inside,ph.m.card,&ph.amount);
printf("\t %8s\t%8s%11d%12d\n",ph.brand,ph.series,ph.price,ph.amount);
}
printf("\n\n");
fclose(fp);
}
}





คือ โปรแกรมมีปัญหา 2 อย่างคือ มันไม่ยอมอัพเดต สต๊อกโทรศัพท์
แล้วเมื่อขายโทรศัพท์ โปรแกรมไม่ยอม แทนที่ข้อมูลเดิมแต่เพ่ือขึ้นมาใหม่แทน