# from int
# --------
assert 37.0 == itof(37);
assert '37' == itos(37);

# from float
# ----------
assert 2 == ftoi(2.8);
assert '3.100000' == ftos(3.1);

# from string
# -----------
assert 128 == stoi('128');
assert 328 == stoi('  328  ');
assert 24 == stoi('  24 7  ');
assert -34 == stoi('-34');
assert -34 == stoi(' -34 ');
assert 0 == stoi('abc');

assert 2.4 == stof('2.4');
assert -2.4 == stof('-2.4');
assert 322.4 == stof('    322.4  ');
assert -2.4 == stof('  -2.4   ');