Vector and Iterator
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Vector and Iterator
by Christopher Tue Mar 02, 2010 5:52 pm
- Code:
#include<iostream.h>
#include<vector.h>
#include<iomanip.h>
using namespace std;
struct stud
{
string name,sex;
int age;
};
int main()
{
vector<stud> details;
int count=1;
stud s;
cout<<"Enter Details of Student "<<count<<endl;
cout<<"Name : ";
while(cin>>s.name)
{
cout<<"Age : ";
cin>>s.age;
cout<<"Sex : ";
cin>>s.sex;
details.push_back(s);
++count;
cout<<"Enter Details of Student "<<count<<endl;
cout<<"Name : ";
}
for(vector<stud>::iterator i=details.begin();i!=details.end();i++)
{
cout<<setw(10)<<i->name<<" "<<setw(10)<<i->age<<" "<<setw(10)<<i->sex<<endl;
}
}
Last edited by Christopher on Tue Mar 02, 2010 6:09 pm; edited 1 time in total
Christopher- Admin
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Age : 35 -
hii
by Vineet_More Tue Mar 02, 2010 5:56 pm
Can you explain what is a vector... is it having an array concept or something different...
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Re: Vector and Iterator
by Christopher Tue Mar 02, 2010 6:16 pm
Vector is also known as dynamic array. Difference between array and vector is storage is handled automatically in vectors but not in arrays. Vectors are most efficient if u want to add and delete elements from one end.
To know more about vectors, read this link.
http://www.cplusplus.com/reference/stl/vector/
To know more about vectors, read this link.
http://www.cplusplus.com/reference/stl/vector/
Christopher- Admin
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VECTOR
by Vineet_More Wed Mar 03, 2010 11:52 am
Can you just Explain what the following line is doing in the program:
vector<stud>::iterator i=details.begin();
vector<stud>::iterator i=details.begin();
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Re: Vector and Iterator
by crack2drop Wed Mar 03, 2010 6:22 pm
initializing the value of the iterator which is of the type vector<stud>......it initializes with the starting value in the vector
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Re: Vector and Iterator
by Vineet_More Wed Mar 03, 2010 6:30 pm
then for intialising the value instead of writing
vector<stud>::iterator i=details.begin();
we could have written
iterator i=details.begin(); as details has been declared as a vector.
what is the need of the scope resolution operator(:
?
Can anyone explain please?
vector<stud>::iterator i=details.begin();
we could have written
iterator i=details.begin(); as details has been declared as a vector.
what is the need of the scope resolution operator(:
?Can anyone explain please?
Vineet_More- Posts : 27
Points : 31
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Re: Vector and Iterator
by Christopher Wed Mar 03, 2010 6:38 pm
for example, only integer pointer can hold the address of an integer variable. Same here, iterator of type vector<stud> only can hold the address of vector<stud> variable.
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