I want to get string input from the user. At the same time, I want to supply a default string so that if the user doesn't want to change it, they can just press enter. How can that be done in C++?
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2In a console application or a GUI? If a GUI, which framework?johnsyweb– johnsyweb2011-03-16 08:48:21 +00:00Commented Mar 16, 2011 at 8:48
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3 Answers
#include <iostream>
#include <string>
using namespace std;
int main(int argc, char* args[])
{
const string defaultText = "Default string";
string str;
string tmp;
getline(cin, tmp);
if (!tmp.empty()) //user typed something different than Enter
str = tmp;
else //otherwise use default value
str = defaultText;
cout << str << endl;
}
3 Comments
CadentOrange
The correct way for checking if a string is empty is to call .empty() instead of .size().
Maciej Ziarko
Yes, I must agree. I changed it to
!tmp.empty()
node ninja
= shouldn't be used for setting strings, but it's ok here because it's a const right?
You should be able to do it with the version of getline() defined in . You can use it like this:
#include <iostream>
#include <string>
using namespace std;
int main()
{
string str;
getline(cin,str);
// Use str
}
Comments
Just use two strings: Default string and User_supplied string. Get the input from the user (for the user_supplied string) and do an strlen on this string to check if it has a length greater than zero. If so use the User_supplied string, else use the default string
