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Please help me in doing this problem in C++ without filing

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```
#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#define min(a,b)((a)<(b)?(a):(b))
int a[6000];
main()
{
file*input=fopen("number.in","r");
int n,p2,p3,p5,p7;
a[1]=n=p2=p3=p5=p7=1;
while (a[n]<2000000000)
{
a[1+n]=min4(2*a[p2],3*a[p3],5*a[p5],7*a[p7]);
if (a[n]==2*a[p2]) p++;
if (a[n]==3*a[p3]) p++;
if (a[n]==5*a[p5]) p++;
if (a[n]==7*a[p7]) p++;
}
{
fscanf(input,"%d",&n);
if (n==0) break;
printf("the%d",n);
if (n%10==1&& n/10% 10!=1)
printf("st");
else if(n%10==2&& n/10% 10!=1)
printf("nd");
else
if(n%10==3&& n/10% 10!==1)
printf("rd");
else
printf("th")
printf("humble number is %d\n",a[n]);
}
fclose(input);
return 0;
}
```