cout in c++

[hisoka]

cout in c++ can be used like this :

 

 

int main(){cout << "green" << "land" << endl;system("pause"); }

 

or like this

 

 

int main(){cout << "green" ;

cout << "land"<<endl ;system("pause"); }

 

output :

 

greenland

 

However I want the output to be

 

green land

 

but I cannot figure out How . I want a space between the two word using cout So how?

 

any idea ?

[Ingolme]

Try

cout << " "

[Don E]

You can do something like for example:

 

cout << "green " << "land" << endl;

 

or

 

cout << "green" << " " << "land" << endl;

[hisoka]

Thanks for both of you it works

 

 

I tried another thing :

 

 

this works too

 

int main(){string m = "green";string n = "land";cout<< m + " " + n <<endl;system("pause"); }

 

Now I tried it like that :

 

int main(){cout<< "green" + " " + "land" <<endl;system("pause"); }

 

but it gives an error .

 

8 C:da.cpp invalid operands of types `const char[6]' and `const char[2]' to binary `operator+'

 

I could not understand the error : Any explanation ? and how to correct the little piece code ?

[hisoka]

I can simply use

 

cout<<"green land"<<endl; and that is all . Why am I complicating things !!

 

it gives green land

[Ingolme]

In C++. the + operator only is used to add numbers. It can't do anything with strings.

[hisoka]

"the + operator only is used to add numbers. It can't do anything with strings"

 

int main(){string man = "py";string woman = "thon";cout<<man+woman<<endl;system("pause");}

 

output python

 

it concatenates string so it is not only used for math operations but for string concatenation too

 

what do you think?

[justsomeguy]

These variables:

string m = "green";string n = "land";

are strings. When you do this:

cout<< "green" + " " + "land" <<endl;

those are not strings, they are character array constants, like the error message points out:

8 C:da.cpp invalid operands of types `const char[6]' and `const char[2]' to binary `operator+'

Those are also referred to as C-style strings. C does not have strings, so a string in C is represented as an array of characters terminated by null (which is why the lengths are 6 and 2 instead of 5 and 1, the extra character is a null). You can cast either one as a C++ string and it will work, but like you said there is no point in concatenating 2 literals.

[hisoka]

Very good . Now i understand the meaning of the error