import string:*
import mem:*

fun system(call_string: string):int {
    var c_call_string = call_string.toCharArray()
    var result  = system(c_call_string)
    delete(c_call_string)
    return result
}
ext fun system(call_string: *char): int
ext fun exit(code: int):void
fun exit() exit(0);