Final answer:
The program has two variables, x and y, both defined as integers. Without the code, c-use, p-use, and DU pairs cannot be provided. Test cases cannot be derived without code implementation or operation description.
Step-by-step explanation:
The given program is:
int VarTypes(int x, int y) {
// code...
}
In this program, we have two variables: x and y. The definition of these variables is int, which means they are integers.
The c-use (computational use) of these variables refers to any computation or operation performed with the variables. In this program, the c-use of x and y is not provided since the code within the function is not given.
The p-use (predicate use) is the use of the variables in predicates or conditional statements. Similarly, since the code is not provided, the p-use of x and y cannot be determined.
DU (definition-use) pairs refer to the relationship between the definition and use of a variable. Without the code, we cannot determine the specific DU pairs for x and y.
To derive test cases for testing all DU pairs of the program, we need the code implementation or a description of the operations performed on x and y. Without that information, it is not possible to derive specific test cases.