Difference between revisions of "Code Snippet: User Input-Single Line"
From Coder Merlin
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= Reading a single line of text from the console = | = Reading a single line of text from the console = | ||
Note: Input read from the console is terminated with a ^D (Control-D) which indicates the end-of-file. | :Note: Input read from the console is terminated with a ^D (Control-D) which indicates the end-of-file. | ||
== Swift == | == Swift == | ||
Line 21: | Line 21: | ||
== Python == | == Python == | ||
<syntaxhighlight lang="python"> | <syntaxhighlight lang="python"> | ||
try: | |||
print("You typed: %s" % | text = input() | ||
except: | |||
text = "" | |||
print("You typed: %s" %text) | |||
</syntaxhighlight> | |||
== Perl == | |||
<syntaxhighlight lang="perl"> | |||
my $input = <STDIN>; | |||
print "You typed: $input"; | |||
</syntaxhighlight> | |||
== C == | |||
<syntaxhighlight lang="c"> | |||
#include <stdio.h> | |||
int main(void){ | |||
char line_buffer[64]; // Declare character array capable of holding 63 characters | |||
// Read input from stdin via fgets | |||
// check fgets return for NULL if EOF is passed | |||
if(fgets(line_buffer,64,stdin) == NULL){ | |||
return 0; // Indicate successful run to the OS | |||
} | |||
printf("You typed: %s\n",line_buffer); //Output input | |||
return 0; // Indicate a successful run to the OS | |||
} | |||
</syntaxhighlight> | |||
== C++ == | |||
<syntaxhighlight lang="c++"> | |||
#include <iostream> | |||
#include <string> | |||
int main() { | |||
std::string input; | |||
std::getline(std::cin, input); | |||
if (!std::cin.fail()) { | |||
std::cout << "You typed: " << input; | |||
} | |||
return 0; | |||
} | |||
</syntaxhighlight> | |||
== Common Lisp == | |||
<syntaxhighlight lang="lisp"> | |||
(defvar input) | |||
(setq input (read-line)) | |||
(format t "You typed: ~(~s~) ~%" | |||
input) | |||
</syntaxhighlight> | |||
== Ruby == | |||
<syntaxhighlight lang="ruby"> | |||
text = gets | |||
puts "You typed: " + text | |||
</syntaxhighlight> | </syntaxhighlight> |
Latest revision as of 10:06, 24 August 2020
Within these castle walls be forged Mavens of Computer Science ...
— Merlin, The Coder
Reading a single line of text from the console[edit]
- Note: Input read from the console is terminated with a ^D (Control-D) which indicates the end-of-file.
Swift[edit]
// Read a single line of input from the console
let line = readLine() // This will return an optional string
if line != nil { // Let's check if it's not nil, if so, it's really a string
let text = line! // Unwrap the string
print("You typed: \(text)") // Print the string
}
// Read a single line of input from the console (syntactic sugar)
if let text = readLine() {
print("You typed: \(text)")
}
Python[edit]
try:
text = input()
except:
text = ""
print("You typed: %s" %text)
Perl[edit]
my $input = <STDIN>;
print "You typed: $input";
C[edit]
#include <stdio.h>
int main(void){
char line_buffer[64]; // Declare character array capable of holding 63 characters
// Read input from stdin via fgets
// check fgets return for NULL if EOF is passed
if(fgets(line_buffer,64,stdin) == NULL){
return 0; // Indicate successful run to the OS
}
printf("You typed: %s\n",line_buffer); //Output input
return 0; // Indicate a successful run to the OS
}
C++[edit]
#include <iostream>
#include <string>
int main() {
std::string input;
std::getline(std::cin, input);
if (!std::cin.fail()) {
std::cout << "You typed: " << input;
}
return 0;
}
Common Lisp[edit]
(defvar input)
(setq input (read-line))
(format t "You typed: ~(~s~) ~%"
input)
Ruby[edit]
text = gets
puts "You typed: " + text