Can cout do like printf("Name: %s, Age: %d\n",name,age)?

[cylin]

Dear all,

To do below is too long.
cout << "Name: " << name << ", Age: " << age << endl;
Can cout use "%" to implement?
Thanks.

cylin.

 

[Sam Holden]

Dear all,

To do below is too long.
cout << "Name: " << name << ", Age: " << age << endl;

If 20 characters of typing is enough to make you want to avoid
type safety, then I don't C++ is the language for you.

Can cout use "%" to implement?

No.

 

[Peter van Merkerk]

To do below is too long.

cout << "Name: " << name << ", Age: " << age << endl;

Why it is too long?
If you would remove the spaces around the '<<' operators (just like the
printf), the cout version is only 4 character longer. That seems to be a
small price to pay for the type safety you get with cout.

Can cout use "%" to implement?

No.

 

[John Harrison]

Dear all,

To do below is too long.
cout << "Name: " << name << ", Age: " << age << endl;
Can cout use "%" to implement?
Thanks.

cylin.

No, but boost do a format library that adds this to C++

http://www.boost.org/libs/format/index.htm

john

 

[Bob Jacobs]

Dear all,

To do below is too long.
cout << "Name: " << name << ", Age: " << age << endl;
Can cout use "%" to implement?
Thanks.

Your two examples are not equivalent. In the version using cout you flush
the output stream, whereas in the printf version you don't.

 

[Roy Smith]

Dear all,

To do below is too long.
cout << "Name: " << name << ", Age: " << age << endl;
Can cout use "%" to implement?
Thanks.

cylin.

Check out boost.format (http://www.boost.org/libs/format/index.htm)

 

[Mike Wahler]

Dear all,

To do below is too long.
cout << "Name: " << name << ", Age: " << age << endl;

Removing unnecessary whitepace and using
same newline expression in order to form
a valid comparision:

printf("Name: %s, Age: %d\n",name,age);

cout<<"Name: "<<name<<", Age: "<<age<<'\n';

Is an extra four characters really too high
a price to pay for type safety?

Can cout use "%" to implement?

I suppose one could write some code to simulate
it, but what's the point?

Also note that 'printf()' is just as valid
(but less safe) a function in C++ as are the
stream inserters.

If you insist upon using '%' specifiers, why not just
use 'printf()'?

-Mike