String concatenation: Difference between revisions
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=={{header|UNIX Shell}}== |
=={{header|UNIX Shell}}== |
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<pre> |
<pre>s="hello" |
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s="hello" |
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echo "$s literal" |
echo "$s literal" |
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s1="$s literal" |
s1="$s literal" |
Revision as of 00:06, 18 December 2008
String concatenation
You are encouraged to solve this task according to the task description, using any language you may know.
You are encouraged to solve this task according to the task description, using any language you may know.
Set a string variable equal to any text value. Print it to the console concatenated with a string literal. Create a new string variable whose value is the other variable concatenated with a string literal. Print this new variable.
BASIC
<qbasic>s$ = "hello" print s$;" literal" 'or s$ + " literal" s2$ = s$ + " literal" print s2$</qbasic> Output:
hello literal hello literal
C
<c>#include <stdio.h>
- include <stdlib.h>
- include <string.h>
char *sconcat(char *s1, char *s2) {
char *s0 = malloc(strlen(s1)+strlen(s2)+1); sprintf(s0, "%s%s", s1, s2); return s0;
}
int main() {
char *s = "hello"; char *s2; printf("%s literal\n", s); /* or */ printf("%s%s\n", s, " literal"); s2 = sconcat(s, " literal"); puts(s2); free(s2);
}</c>
C++
<cpp>#include <string>
- include <iostream>
int main() {
std::string s = "hello"; std::cout << s << " literal" << std::endl; std::string s2 = s + " literal"; std::cout << s2 << std::endl; return 0;
}</cpp> Output:
hello literal hello literal
Haskell
import System.IO s = "hello" s1 = s ++ " literal" main = do putStrLn (s ++ " literal") putStrLn s1
Java
<java>public class Str{
public static void main(String[] args){ String s = "hello"; System.out.println(s + " literal"); String s2 = s + " literal"; System.out.println(s2); }
}</java> Output:
hello literal hello literal
Objective-C
<objc>#import <Foundation/Foundation.h>
int main() {
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; NSString *s = @"hello"; printf("%s%s\n", [s UTF8String], " literal"); NSString *s2 = [NSString stringWithFormat:@"%@%@", s, @" literal"]; puts([s2 UTF8String]); /* or */ NSMutableString *s3 = [NSMutableString stringWithString: s]; [s3 appendString: @" literal"]; puts([s3 UTF8String]); [pool release]; return 0;
}</objc>
Perl
<perl>#! /usr/bin/perl my $s = "hello"; print $s . " literal" . "\n"; my $s1 = $s . " literal"; print $s1 . "\n";</perl>
UNIX Shell
s="hello" echo "$s literal" s1="$s literal" echo $s1