Need help with struct [turboc++4.5]

[earthempire]

I'm a student studying c++ in class and here struct with array
i don't know what to do now cause it instantly crash when i compile this, no error message at all.

***turbo c++ 4.5***

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


void main()
{
struct prod{
int i3,i5,i7,a8,a10,fx6,fx8;
float sum;
} cpu;
struct customer{
char id[15];
struct prod cpu;
} cst[30][50];
int i=0,j=0,ti3[30],ti5[30],ti7[30],ta8[30],ta10[30],tfx6[30],tfx8[30],ti=1,tj=1;
float nsum=0,xsum[50],tsum=0;
char ss,x;
clrscr();
printf("\n 1 - Intel Core I3 3599");
printf("\n 2 - Intel Core I5 5599");
printf("\n 3 - Intel Core I7 7599");
printf("\n 4 - AMD A8 3749");
printf("\n 5 - AMD A10 4999");
printf("\n 6 - AMD FX6 5229");
printf("\n 7 - AMD FX8 7499");
printf("\n 0 - Next Customer\n");

getch();
for(i=0;i<ti;i++,ti++)
{
tsum=0; fflush(stdin); xsum[i]=0;
printf("Customer# %d : \n",i+1);
if(i>0)
{
printf("Finish? [Y/N]"); x=getche();
if(x=='y'||x=='Y')
ti-=1;
else
{
clrscr();
printf("Customer# %d : \n",i+1);
}
}

printf("\tID : "); fflush(stdin); gets(cst[i][j].id);

for(j=0;j<tj;j++,tj++)
{

printf("\tProduct #%d",j+1);
R:
printf("Choose : "); fflush(stdin); ss=getche();

if(ss=='1')
{tsum+=3599; ti3[i]+=1; cst[i][j].cpu.i3=ti3[i];}
else if(ss=='2')
{tsum+=5599; ti5[i]+=1; cst[i][j].cpu.i5=ti5[i];}
else if(ss=='3')
{tsum+=7599; ti7[i]+=1; cst[i][j].cpu.i7=ti7[i];}
else if(ss=='4')
{tsum+=3749; ta8[i]+=1; cst[i][j].cpu.a8=ta8[i];}
else if(ss=='5')
{tsum+=4999; ta10[i]+=1; cst[i][j].cpu.a10=ta10[i];}
else if(ss=='6')
{tsum+=5229; tfx6[i]+=1; cst[i][j].cpu.fx6=tfx6[i];}
else if(ss=='7')
{tsum+=7499; tfx8[i]+=1; cst[i][j].cpu.fx8=tfx8[i];}
else if(ss=='0')
{tj-=1;}
else
goto R;



cst[i][j].cpu.sum=tsum;

fflush(stdin);
}
xsum[i]=tsum;
}

printf("\n\tPress any key to list... \n");
getch(); clrscr(); j=0;

for(i=0;i<ti;i++)
{ printf("\n Customer ID %s \n",cst[i][j].id);


for(j=0;j<tj;j++)
{
if(ti3[i]>0)
{
printf("\nIntel Core i3 [3599] X %d",cst[i][j].cpu.i3);
}
if(ti5[i]>0)
{
printf("\nIntel Core i5 [5599] X %d",cst[i][j].cpu.i5);
}
if(ti7[i]>0)
{
printf("\nIntel Core i7 [7599] X %d",cst[i][j].cpu.i7);
}
if(ta8[i]>0)
{
printf("\nAMD A8 [3749] X %d",cst[i][j].cpu.a8);
}
if(ta10[i]>0)
{
printf("\nAMD A10 [4999] X %d",cst[i][j].cpu.a10);
}
if(tfx6[i]>0)
{
printf("\nAMD FX6 [5299] X %d",cst[i][j].cpu.fx6);
}
if(tfx8[i]>0)
{
printf("\nAMD FX8 [7499] X %d",cst[i][j].cpu.fx8);
}



}
printf ("TOTAL %.2f",cst[i][j].cpu.sum);

}

printf("\n\n\tOVERALL TOTAL : %.2f\n",xsum[i]);






}

sorry for my bad english.