Answer: after freedom in 1947 Pakistan sees many Martial laws and political governments as well. from 1947 to 2013 Pakistan got 11 Presidents some of which where Military Dictators while some where elected presidents.
following is their list:
Iskander Mirza
Ayub Khan
Yahya Khan
Zulfikar Ali Bhutto
Fazal Ilahi Chaudhry
Muhammad Zia-ul-Haq
Ghulam Ishaq Khan
Wasim Sajjad
Muhammad Rafiq Tarar
Pervez Musharraf
Asif Ali Zardari