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#include <stdio.h>
#define $arg function_argument
#define my int
#define sub int
#define BEGIN int main(void)
my $arg;
sub hello() {
printf("Hello, welcome to the Fibonacci Numbers!\n");
printf("This program is all, valid C and C++ and Perl and Raku code!\n");
printf("It calculates all fibonacci numbers from 0 to 9!\n\n");
return 0;
}
sub fibonacci() {
my $n = $arg;
if ($n < 2) {
return $n;
}
$arg = $n - 1;
my $fib1 = fibonacci();
$arg = $n - 2;
my $fib2 = fibonacci();
return $fib1 + $fib2;
}
BEGIN {
hello();
my $i = 0;
while ($i <= 10) {
$arg = $i;
printf("fib(%d) = %d\n", $i, fibonacci());
$i++;
}
}
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