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

//-----------------------------------------------------------------
    void main()
    {
      clrscr();
      FILE *f;
      int i,n;
      int a;
      f=fopen("input.dat","wb");
      cout<<"n="; cin>>n;
      fwrite(&n, sizeof(int),1,f);
      for(i=0; i<n; i++)
      {
    cout<<"a["<<i<<"]="; cin>>a;
    fwrite(&a, sizeof(int),1,f);
      }
      fclose(f);
    }

# include <iostream.h>
# include <stdio.h>
# include <math.h>
# include <conio.h>
# include <alloc.h>

//-----------------------------------------------------------------
    void main()
    {
      clrscr();
      FILE *f,*g;
      int i,n,imin=0,imax=0,s=0;
      int *a,*b;
      f=fopen("input.dat","rb");
      fread(&n,sizeof(int),1,f);
      a=new int[n];
      fread(a,sizeof(int),n,f);
      for(i=0; i<n; i++)
      {
    if(a[imax]<a[i]) imax=i;
    if(a[imin]>a[i]) imin=i;
      }
      for(i=0; i<imin; i++)
       s++;
      for(i=imax+1; i<n; i++)
       s++;        
      b=new int[s]; int t=0;
      for(i=0; i<imin; i++)
      {
    b[t]=a[i];
    t++;    
      }
      for(i=imax+1; i<n; i++)
      {
    b[t]=a[i];
    t++;
      }
      for(i=0; i<t; i++)
    {
      cout<<"\n b["<<i<<"]="<<b[i];
      cout<<endl;
    }
      g=fopen("result.txt","wt");
       for(i=0; i<t; i++)
      {
      fprintf(g,"%f ",b[i]);
      }
      fclose(g);  
      fclose(f);
      delete[]a;
      delete[]b;  
      getch();
    }

#include <conio.h>
#include <iostream.h>
#include <stdio.h>
#define maxline 80

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

void getchars(char a[])
{
  char c;
  for(int i=0; i<maxline && (c=getchar())!='\n';i++)
  *(a+i)=c;
  *(a+i)='\0';
}

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

int prost(int a)
{
  if(a<=0)return 0;
  int b=2;
  while(b<=a/2)
  {
    if(a%b==0)return 0;
    b++;
  }
return 1;
}

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

int main()
{
  clrscr();
  char s[maxline];
  int a=0,i=0;
  cout<<"Enter String -> ";
  getchars(s);
  while(s[i]!='\0')
  {
    if(s[i]>='0'&&s[i]<='9')
    {
      a*=10;
      a+=s[i]-'0';
    }
    else if(prost(a))
    {
      cout<<"Yes - "<<a;
      getch();
      return 1;
    }
    else
    a=0;
    i++;
  }
cout<<"no";
getch();
return 0;
}