very basic dev-c++ question

Sandals

Ok I am used to using sub etha edit on macs, yet when I try to use dc++ some of my programmes just suddenly close,

this is a stupid example which does work


//?//
#include <iostream>
using namespace std;

int main (){
double a,b,c,e,f,g,h,i;

cout << "Enter a value for a ";
cin >> a;
cout << " Enter a value for b ";
cin >>b;
cout << "Enter a value for c ";
cin >>c;
e= + a + b +c;
cout << "The value of " << e << "is" << endl;
cin >> f;
cout << f;
cin >> g;
h=(2*45*34*a)-(b*c*e);
cout <<h;
cin >> i;
return 0;
};


the problem is that whenever i make a cout <<
line and dont follow it up with c cin >> line
the programme closes, it is as if everytime I write a cout it must be asking for a value


Any ideas,

sorry if this is obvious/unclear.

bringitdown

Well cin will block awaiting input so the program will stop executing and await a 'user' to input something.

If you have no blocking statements in your program, for example if you have:

#include <iostream>
using namespace std;

int main (){

cout << "This program will close immediately";

return 0;
};

The program will execute the whole way through and close. To see output from such a program run it in a console / command-prompt (Mac OS X has one, previous versions?)

Sandals

ok great, that is what I am talking about, but can I get a console for windoes, where?

bringitdown

For windows, the command line interpreter will do

Start->Run->command
OR
Start->Run->cmd

You will have to navigate to the directory your application / binary is in using DOS commands:

cd c:
cd SomeDir
etc
etc

dawballz

Just before your

return 0;

put in:

cin.get();

Then, when you run the program, it will do whatever else it is doing, then you'll get an _, then just press enter and it closes..
Gives you a chance to see stuff that is output.

Noogop

just add the line

system("PAUSE");

before your return 0;
it will make the program output the line
"Press any key to continue . . ."
before closing, you just hit return to end the program

Sandals

Ok thanks noogop, so much that is perfect I really apreciate it , all the other advice was lame and did'nt work.

bringitdown

All the other advice ... last time you get jack from me.

I explained the problem and gave you pointers on how to solve it, noogop gave you 'an' answer, one I wouldn't agree with but anyhoo on your merry way.