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Array of Objects in C++ Language

21 September, 2018

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Array of objects

Creating more than one object of similar type is called Array of objects in C++ creating an array of type class. syntax class-name array-name[size]  

// wap to find result 5 students

#include <iostream.h> class student { int no; int sub1,sub2; public read_student(); void find_student(); } void student read_student() { cout<<”Enter rno”; cin>>rno; cout<<”Enter marks of 2 subjects”; void  student :: find _student() { cout<<”\n<<rno<<”\t”<<sub|<<”\t”<<sub2; cout<<”\t Fail”; else cout<<”\t pass”; } void main() { student stud[5]; int i; for(i=0;i<5;i++) stud[i].read_student(); for(i=0;i<5;i++) stud[i].find_result(); }   O/P :  input rollno 101 input 2 subject marks 604 input roll no 102 i/p 2 subject Screenshot_18    

Dynamic Array of object in C++

  • Allocating memory for more than one object during runtime
Syntax <pointer-to-object> = new class-name[size];
  • size can be constant or variable
 

Example : // wap to read the details n persons and display

# include <iostream.h> class person { char name[10]; char city[10]; public : void read_person(); void print_person(); }; void person  :: read person() { cout<<”\n input name”; cin>>name; cout<<”\n input ciyt”; } void person :: print_person() { cout<<”\n”<<name<<”\t”<<city; } void main() { int n; person   *p; cout<<”\n input details of how many person”; cin>>n; p=new person[n]; int i; for(i=0;i<n;i++) { P[i].read_person(); for(i=0;i<n;i++) p[i].print_person(); delete P; } # include<iostream.h> { class player { char name[10]; int runs; public : void read(); void print(); }; void player :: read() { cout<<”\n input name”; cin>>name; cout<<”\n input runs”; cin>>runs; } void player  :: print() { cout<< “\n”<<name<<”\t”<<runs; } void main() { int n; cout<<”\n input details of house many players”; cin>>n; player *p; p=new player[n]; int i; for(i=0;i<n;i++) p[i].read(); for(i=0;i<n;i++) (*(p+i).print()); delete P; P=NULL; }
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