problems with include files in Dev-Cpp 4.9.8.0

I jsut got Dev-Cpp 4.9.8.0 and i cant figure out what includes to put in the ones i were using in 4.9.4.1 dont work... I need teh include for cout and cin for ifstream and ofstream and any other basic necesities for most programs



EDIT: Does it have to do with my hard drive letter being F: not C:

What happens if you compile this:

Code:

---

#include <iostream>
 
 int main()
 {
  std::cout <<"hello world" <<std::endl;
 }

---

[edit]
>>Does it have to do with my hard drive letter being F: not C:
Maybe, I expect you'll have to tell the compiler where your include libraries are located if they're not in the default location.

Goto
Tools -> Compiler Options -> Directories

Quote:

---

Originally Posted by Hammer

What happens if you compile this:

Code:

---

#include <iostream>
 
 int main()
 {
  std::cout <<"hello world" <<std::endl;
 }

---

[edit]
>>Does it have to do with my hard drive letter being F: not C:
Maybe, I expect you'll have to tell the compiler where your include libraries are located if they're not in the default location.

---

That complied fine...whats with the std::cout instead of just cout
The complie seem to be looking in the right directories.
But when i try adding #include <iostream> i get this error: 'cout' undeclared (first use function)
EDIT: Ah i think that there was something wrong in the incude files seems to work fine now

Dev-C++ uses the MinGW port of GCC, which tries the follow the current standards.

These standards have something called namespaces.
cout, cin, endl are examples of identifiers that belong to the std namespace.
You then must use them as std::cout, std::cin, std::endl
You could also declare at the start:
using std::cout;
using std::cin;
using std::endl;
and then use them as cout, cin, endl

Conversely, you could use the entire namespace:
using namespace std;
but that generally defeats the purpose of namespaces, i.e. to avoid conflicts where identifiers have identical names in different libraries/modules/classes used in a program.

I have a new problem is it possible to put

Code:

---

ofstream fouts2("Saves/save2.txt");

---

in a Switch statement

Yes.

Well i keep geting this error:
Jump to case labels
and
crosses initialization of `std::ofstream fouts1'

what code did you use?

You may have to place the code within a code block, e.g.

Code:

---

switch (something) {
case 1:
        {
                //some code
                ofstream fouts2("Saves/save2.txt");
                //some code
        }
        break;
default:
        //some code
}

---

more like this:

Code:

---

case 2:
      ofstream fouts2("Saves/save2.txt");
      cout<<"\nEnter save name(Less then 10 charcters):";
      cin>>save2;
      fouts2<<save2<<"\n";
      fouts2<<turn<<"\n";
      fouts2<<money<<"\n";
      fouts2<<numfish<<"\n";
      fouts2.close();
      Menu();
      break;

---

The corrected code should be:

Code:

---

case 2:
        {
                ofstream fouts2("Saves/save2.txt");
                cout<<"\nEnter save name(Less then 10 charcters):";
                cin>>save2;
                fouts2<<save2<<"\n";
                fouts2<<turn<<"\n";
                fouts2<<money<<"\n";
                fouts2<<numfish<<"\n";
                fouts2.close();
                Menu();
        }
        break;

---

I'm not too sure why, but from my experience declaring variables within a case block always seems to have problems unless that block is explicitly placed in a code block by using braces.