Strukturalarga oid masalalar yechish

Strukturalarga oid masalalar yechish

Strukturalar

Structura – bul bir neshe structuralardi, maydanlardi ha’m har qiyli tiplerdi biriktiriwshi tip).

qasiyeti:

• avtor (qatar)
• ati (qatar)
• jili (putin san)
• Betler sani (putin san)

masele: usilardin barligin bir putin etip birlestiriw

struct Book {

char author[40];

char title[80];

int year;

int pages;

};

Stucturaga berilgen magliwmatlardi kiritiw?

Yad ajiratilmaydi!

!

structura

ati

maydan

Struktura sitaksisi

struct

{ 

;

;

…

;

}; 

Bul jerde - struktura ko'rinisinde jarati'li'p ati'rg'an jan'a tu’rdin’ ati', i> i> - strukturani'n' i-maydani'ni'n' (ati') dag'azasi'.

Programmaliq ulgiler

Ma’sele: books.dat fayilinda kitap haqqindag’ berilgenler keltirilgen bolip, ol Book tipindegi ( 100 den kishi) structura korinisinde berilgen. Olardin’ barliginin’ shiqqan jilina 2008 di ornatip qaytadan usi faylg’a jazin.

#include

struct Book { … };

void main()

{

Book B[100];

int i, n;

FILE *f;

f = fopen ( "books.dat", "rb" );

n = fread ( B, sizeof(Book), 100, f );

fclose(f);

for ( i = 0; i < n; i ++ ) B[i].year = 2008;

fp = fopen("books.dat", "wb" );

fwrite ( B, sizeof(Book), n, f );

fclose ( f );

}

struct Book { … };

f = fopen ( "books.dat", "rb" );

n = fread ( B, sizeof(Book), 100, f );

fclose ( f );

fp = fopen("books.dat", "wb" );

fwrite ( B, sizeof(Book), n, f );

fclose ( f );

structuranin’ toliq jaziliwi

Massivti oqiw (≤ 100 struktura), n o’zgeriwshige massiv uzinlig’i jaziladi

Massivke (n strukturani) jaziw

#include

#include

using namespace std;

double Kvadrat(double x){

double y;

y=pow(x,2);

cout<<"kvadrat(R) ishladi"<

return y;

}

unsigned int Kvadrat(int x){

cout<<"unsigned ishladi"<

return pow(x,2);

}

int main(){

int x1;

unsigned int y1;

cin>>x1;

y1=Kvadrat(x1);

double x2,y2;

cin>>x2;

y2=Kvadrat(x2);

cout<<"y1="<

cout<<"y2="<

return 0;

}

Struktura misal

#include

#include

using namespace std;

int fact(int n){

double y;

if(!n || n==1)

return 1;

else{cout<

return fact(n-1)+n;}

}

int main(){

int n;

cin>>n;

cout<}

Struktura misal

#include

using namespace std;

struct Nuqta {

float x;

float y;

};

int main()

{

int i,n,k=0;

cout<<"n="; cin>>n;

Nuqta a[n];

for(i=0;i

{

cin>>a[i].x;

cin>>a[i].y;

}

for(i=0;i

if(a[i].x>0 && a[i].y>0)

{

cout<<"("<

k++;

}

cout<<"1-chorakdagi nuqtalar soni "<

return 0;

}

Struktura misal

#include

#include

using namespace std;

struct Talaba {

char ism[20];

char guruh[3];

int yil; };

int main(){

int i,n;

cout<<"n="; cin>>n;

Talaba t[n];

for(i=0;i

cout<<"Ism:";

cin>>t[i].ism;

cout<<"guruh";

cin>>t[i].guruh;

cout<<"yil";

cin>>t[i].yil; }

cout<<"1997 yil tug'ilganlar"<

for(i=0;i

if(t[i].yil==1997 && strcmp(t[i].guruh, "1-g")==0) {

cout<<"ism"<

} return 0;

}

Struktura misal