It's time to troll some more...

Symta:

chr [0..127]

Perl:

say map {chr($_)} 0..255;

Ruby:

(0..127).each { |n| p n.chr }


PHP:

echo join(array_map('chr', range(0, 127)));

Scheme:

(build-list 127 (lambda (x) integer->char(+ x 1)))

Haskell:

main = print $ map (toEnum :: Int -> Char) [0..127]

Python:

print reduce(lambda x, y: x + chr(y), xrange(1,128), "")

Bash:

for i in `seq 1 127`; do printf \\$(printf '%03o' $i); done

C/C++:

#include <stdio.h>
int main()
{
    char c;
    for (c = 0; c < 127; c++)
        putchar(c);
    putchar('\n');
    return 0;
}

I prefer the C implementation (I don't know why OP called it "C/C++" except to troll I guess).  I like the fact that you have to #include an I/O library.  I don't like the fact that the other languages all just assume that I'm doing text-based I/O, whether I am or not.