Africa is a continent and hence, naturally, has different governments for every country. The question is naive and does not fully make sense. In answer to what government system does South Africa have; it's a democracy.
No because there is no such country or government as "Africa".Africa is a continent. Inside the continent are several countries.
A democratically elected government
Tribal
South Africa's government is based on a Constitutional Democracy.
The Brazilian Government
I prefer a classless moneyless society based on common ownership, where there is no role for government.
South Africa is the most common country for measles.
Unitary governments are the most common.
govern a state or community
untrustness
the manor system