millfork/examples/crossplatform/echo.mfk

#if CBM_64
    import c64_basic
#elseif CBM_264
    import c264_basic
#elseif ZX_SPECTRUM
    // no imports needed
#else
    #error Unsupported platform
#endif

import stdio

void main() {
    while true {
        readline()
        // empty line is read as a single space
        if readline_out[0] == 32 && readline_out[1] == 0 { return }
        putstrz(readline_out)
        putchar(13)
    }
}