lonely-tiger/tests/calc/add

void main() {
    print 1;
    print 2 + 3;
    print 3 + 4 + 5;
    print 6 + 7 + 8 + 9;
    print 3.5 + 5.5;
    print 4.0 + 1.0;
    print 1.0 + -2.0;
    print 6 + -7 + 8 + -9;
}