What is the difference between managing director and president of the company?

The difference between managing director and president of the company is like prime minister and president in India. While both the managing director and prime minister are having wider power in day to day operation of the company/country, both the president of the company and country are mere rubber stamps (though both posts are highly honorable) and their discretionary powers are during AGM of the company,signing important papers/documents and for president of the country, the powers are exercised during Independence Day celebrations,opening/concluding speeches during budget sessions etc.