User Input
We already know how to output the data with the object cout and operator <<. However, sometimes we need to get values directly from the user. To enable this operation use cin in combination with the extraction operator >>.
cin >> x; // Get the value for the variable x
For example, here we want to get the value for the variable a and output it:
12345678910111213141516171801 #include <iostream> 02 using namespace std; 03 04 int main() { 05 // Declare the variable 06 int a; 07 // Print the message for user to get the value 08 cout << "Print a number: "; 09 // Get user input 10 cin >> a; 11 // Display the input of the user 12 cout << "Your number is: " << a; 13 14 return 0; 15 }
In the line #9 the user print the value which will be stored in the variable a.
Swipe to start coding
Let’s write the simple code to output the age of the user.
- Declare the variable
agetype ofint. - Get the value from the user which will be stored in the variable
age. - Display the variable
age.
Don’t forget about semicolon ; at the end of statements.
Løsning
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Completion rate improved to 3.33User Input
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We already know how to output the data with the object cout and operator <<. However, sometimes we need to get values directly from the user. To enable this operation use cin in combination with the extraction operator >>.
cin >> x; // Get the value for the variable x
For example, here we want to get the value for the variable a and output it:
12345678910111213141516171801 #include <iostream> 02 using namespace std; 03 04 int main() { 05 // Declare the variable 06 int a; 07 // Print the message for user to get the value 08 cout << "Print a number: "; 09 // Get user input 10 cin >> a; 11 // Display the input of the user 12 cout << "Your number is: " << a; 13 14 return 0; 15 }
In the line #9 the user print the value which will be stored in the variable a.
Swipe to start coding
Let’s write the simple code to output the age of the user.
- Declare the variable
agetype ofint. - Get the value from the user which will be stored in the variable
age. - Display the variable
age.
Don’t forget about semicolon ; at the end of statements.
Løsning
Skift til skrivebord for at øve i den virkelige verdenFortsæt der, hvor du er, med en af nedenstående mulighederTak for dine kommentarer!
Awesome!
Completion rate improved to 3.33single
