41 lines
1.1 KiB
Markdown
41 lines
1.1 KiB
Markdown
> 1. The following function, which computes the area of a triangle, contains two errors. Locate the errors and show how to fix them. (*Hint*: There are no errors in the formula)
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```c
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double triangle_area(double base, height)
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double product;
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{
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product = base * height;
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return product / 2;
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}
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```
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Answer:
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```c
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// A type annotation is needed for `height`
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double triangle_area(double base, double height)
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{
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// The `product` variable declaration was not in the function block.
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double product;
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product = base * height;
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return product / 2;
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}
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```
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> 2. Write a function `check(x, y, n)` that returns `1` if both `x` and `y` fall between zero and `n - 1` inclusive. The function should return 0 otherwise. Assume that `x`, `y`, and `n` are all of type int
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```c
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int check(int x, int y, int n) {
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int in_range = 1;
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if (x < 0 || y < 0) {
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in_range = 0;
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}
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if (x > n - 1 || y > n - 1) {
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in_range = 0;
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}
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return in_range;
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}
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```
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> 7. Suppose that function `f` has the following definition:
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> `int f(int a, int b) { ... }`
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> Which of the following statements are legal? Assume that `i` has type `int` and `x` has type `double`).
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