Определите назначение программы на Паскале : program test1; const N=1; var A: array[1..N]of integer; I: integer; S: real; begin for I:=1 to N do read(A[i]); S:=0; for I:=1 to N do if A[I] mod 2=0 then S:=S+1; S:=S*100/N; writeln (S); end.

Const n=20;
var a:array[1..n] of integer;
i,i1,i2,x:integer;
begin
Randomize;
a[1]:=random(10);
write(a[1],' ');
for i:=2 to n do
 begin
 a[i]:=a[i-1]+random(10);
 write(a[i],' ');
 end;
writeln;
write('x = '); readln(x);
i1:=1; i2:=n;
repeat
i:=(i1+i2) div 2;
if a[i]<x then i1:=(i1+i2) div 2+1;
if a[i]>x then i2:=(i1+i2) div 2-1;
until (a[i]=x)or(i1>i2);
if a[i]=x then 
 begin
 writeln('Искомый(ые) номер(а) элемента(ов):');
 while (i>0)and(a[i]=x) do i:=i-1;
 i:=i+1;
 while (i<=n)and(a[i]=x) do begin write(i,' '); i:=i+1; end;
 end
 else writeln('Элемент не найден');
writeln;
end.

Пример:
5 6 14 15 15 22 30 36 45 45 50 56 60 64 67 76 84 92 99 101 
x = 15
Искомый(ые) номер(а) элемента(ов):
4 5 

#include

#include

#include

#include

#include

#include

typedef struct

{

char imya[40];

char familiya[40];

char otchestvo[40];

int telefon;

int texpasport;

float pages ;

}gor;

void form(char mass[10], char *imya, char *familiya, char *otchestvo, int telefon, int texpasport)

{

file *f;

gor y;

int i;

if ((f=fopen(mass,"w"))==null) exit(1);

for (i=1; i< =3; i++)

{

cout< < "vvedite imya: ";

cin> > imya;

cout< < "vvedite familiya: ";

cin> > familiya;

cout< < "vvedite otchestvo: ";

cin> > otchestvo;

cout< < "vvedite telefon: ";

cin> > telefon;

cout< < "vvedite texpasport: ";

cin> > texpasport;

fwrite(& y,sizeof(gor),1,f);

if(ferror(f)! =null)

exit(2);

}

fclose(f);

}

void vivod(char mass[50])

{

file *f;

gor z;

if ((f=fopen(mass, "r"))==null) exit(3);

cout< < "fail: "<

while (! feof(f)) {

fread (& z,sizeof(gor),1,f);

if (! feof(f))

{

cout< < "imya: "<

cout< < "familiya: "<

cout< < "otchestvo: "<

cout< < "telefon: "<

cout< < "texpasport: "<

}

fclose(f);

}

}

void del(char fo[10], char fi[10])

{

file *f1,*f2;

gor d;

//char temp[40];

if ((f1=fopen(fi,"r"))==null) exit(4);

if ((f2=fopen(fo,"w"))==null) exit(5);

//cout < < "vvedite nazvanie na ydalenie - ";

//cin > > temp;

for (int i=0; i< 3; i++)

{

fread(& d,sizeof(gor),1,f1);

if (feof(f1)) break;

if (i> 2)

fwrite (& d,sizeof(gor),1,f2);

}

fclose(f2);

fclose(f1);

}

void dobav(char fi[10], char fo[10],char *imya, char *familiya, char *otchestvo, int telefon, int texpasport)

{

int q;

int i;

gor d;

file *f1,*f2;

char temp[40];

if ((f1=fopen(fi, "r"))==null) exit(4);

if ((f2=fopen(fo,"r+"))==null) exit(5);

cout < < "vvedite familiu, pered kotorym nuzno dobavit element: ";

cin > > temp;

for (i=0; i< 10; i++)

{

fread(& d,sizeof(gor),1,f2);

if (feof(f2)) break;

if (strcmp(d.familiya, temp)) break;

q=i;

}

for (i=0; i< 10; i++)

{

if (feof(f2)) break;

fwrite (& d,sizeof(gor),1,f2);

if (i==q-1)

{

cout< < "vvedite imya: ";

cin> > imya;

cout< < "vvedite familiya: ";

cin> > familiya;

cout< < "vvedite otchestvo: ";

cin> > otchestvo;

cout< < "vvedite telefon: ";

cin> > telefon;

cout< < "vvedite texpasport: ";

cin> > texpasport;

cout <

}

}

fclose(f2);

fclose(f1);

}

void main()

{

int n=10;

//cout < < "vvedite kol-vo zapisey: - ";

//cin> > n;

//cout <

form("f1.txt",n);

vivod("f1.txt");

del("f1.txt","f2.txt");

cout < < "posle udalenia: \n";

vivod("f2.txt");

getch();

n=1;

system("cls");

dobav ("f2.txt","f2.txt");

cout < < "posle dobavlenia: \n";

vivod ("f2.txt");

getch();

}