C++ How can i use default value when user just press enter?

[islouis]

c++ cin default

Dear Sir:

May i know how can i use the default int value, when user didnt enter any value and just press enter?

I have used the following code but didnt quit work, assume the default value is int 50, Thanks for any help!

char Chr;
int number;
number=cin.get();
if (Chr==10) // When press enter without a value Chr=10?
number=50;
else
number=Chr;

cout << number;

 

[bilgekaan]

c++ cin default value

your question is logicaly wrong . can you expalin again .

your are trying to set value of number with cin.get() but check the value of chr

char chr is not initilaized so you can not guess its initial value

 

[islouis]

default integer value + int + cpp

Sorry for any mistake. Actually, I want to write a program that will prompt for a user to enter an int value. If however, the user did not enter any value and just pressed enter, the program will use the default value.

For example

Int i=50; set the default value is 50

cout << "Please input a value\n";
cin>>i; \\ <-- in this line, if the user didnt input any value and just press enter, i
want int i use the default 50 as declare in the first place. But i dont
how to do that? And of course if it user did enter a value, then
the program will use the value that user input.

Thanks for any advice!!

Added after 4 minutes:

And the code i used should be:

char Chr;
int number;
Chr=cin.get(); // get a value
if (Chr==10) // When press enter without a value Chr=10?
number=50; //if only press enter, use 50
else
number=Chr; // if there is an input, use the input value

cout << number;

The problem here is, cin.get() return a char, not an int, so it is not working. Is there any better way to achieve this?

Thanks!

 

[ghbolivar]

c++ default cin value

use atoi()

the function convert ascii to integer.....
in the code is:

Char Chr[10]; //Chr is array
.
gets(Chr);//get strings
if(Chr[0]==10)//if Chr[0] is space
number=50;
else
number=atoi(Chr); // is valid


number=Chr; // if there is an input, use the input value IS INVALID only char!!!

enjoy

Added after 15 minutes:

do you want to get ONLY A char???

 

[islouis]

cin default value c++

Thanks a Lot Sir, it works!

char Chr[10]; //Chr is array
int number;
gets(Chr);//get strings
if(Chr[0]==0)//if Chr[0] is space
number=50;
else
number=atoi(Chr); // is valid

cout << number;

BTW, instead of using Char, is that possible to use Int for all variable?
thanks!!

 

[ghbolivar]

what is the default value for integer in cpp?

No. you can Array of Char and convert to int, float or double