Final answer:
The three sources of complexity in a program are functional complexity, data complexity, and control complexity.
Step-by-step explanation:
The three sources of complexity in a program are:
Functional complexity:
This refers to the complexity within the program's functions or methods. It includes factors such as the number of lines of code, the complexity of algorithms used, and the presence of recursive or nested functions.
Data complexity:
This refers to the complexity of the data structures used in the program. It includes factors such as the size of the data set, the number of variables used, and the complexity of data relationships.
Control complexity:
This refers to the complexity of the program's control flow. It includes factors such as the number of decision points, the presence of loops or conditionals, and the overall structure of the program.
These three sources of complexity can interact with each other and can affect the overall maintainability, readability, and performance of a program.