Difference between revisions of "Code Snippet: User Input-Single Line"
From Coder Merlin
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<syntaxhighlight lang="c"> | <syntaxhighlight lang="c"> | ||
#include <stdio.h> | #include <stdio.h> | ||
int main(void){ | int main(void){ | ||
char line_buffer[64]; // Declare array capable of holding 63 characters | char line_buffer[64]; // Declare character array capable of holding 63 characters | ||
fgets(line_buffer,64,stdin); // | |||
// 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 | printf("You typed: %s\n",line_buffer); //Output input | ||
return 0; // Indicate a successful run to the OS | return 0; // Indicate a successful run to the OS | ||
} | |||
</syntaxhighlight> | </syntaxhighlight> |
Revision as of 18:46, 25 December 2018
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)
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
}