array of objects of a class

Question

#include<iostream.h>
class test{
    int a;
    char b;
public:
    test()
    {
        cout<<"\n\nDefault constructor being called";
    }
    test(int i,char j)
    {
        a=i;
        b=j;
        cout<<"\n\nConstructor with arguments called";
    }
};
int main()
{
    test tarray[5];
    test newobj(31,'z');
};

In the above code snippet can we initialize values to tarray[5]?

For sure, the elements you initialize will call the appropriate constructor, and the ones you left uninitialized will be instantiated by default constructor. — Jorg B Jorge
– Jorg B Jorge, Commented May 31, 2010 at 6:52

vava · Accepted Answer · 2010-05-31 07:01:37Z

7

test  tarray[5] = {test(1, 2), test(), test(5, 6), test()};

The fifth element will be initialized with default constructor.

//here length of array will be inferred from number of initializers,
//   so it's going to be 4
test  tarray[] = {test(1, 'a'), test(), test(5, 'b'), test()};

edited May 31, 2010 at 7:01

answered May 31, 2010 at 6:24

vava

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4 Comments

anurag18294 Over a year ago

tarray is an object of class test and it has its own int a and char b.how can we intializa the character

Joey Adams Over a year ago

@anurag18294: tarray is an array of test s, not an instance of test. However, its members are instances of test. In other words, there is no tarray.b, only tarray[0].b, tarray[1].b, etc.

anurag18294 Over a year ago

can we intialize it in this manner test tarray[5]={test(1,'a'),test(3,'b'),test(5,6),test(),test(4,'s')};

vava Over a year ago

@anurag, sure, whatever test constructor can handle.

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