Question
Consider the following procedure.
Procedure Call Explanation
drawLine(x1, y1, x2, y2) Draws a line segment on a coordinate grid with endpoints at coordinates (x1, y1) and (x2, y2)
The drawLine procedure is to be used to draw the following figure on a coordinate grid.
Question
15
Mark for Review
Which of the following code segments can be used to draw the figure?
xVal 1
yVal 0
len 1
REPEAT 5 TIMES
{
drawLine(xVal, yVal, xVal, yVal + len)
xVal xVal + 1
len len + 1
}
Option A,xVal ← 1 yVal ← 0 len ← 1 REPEAT 5 TIMES { drawLine(xVal, yVal, xVal, yVal + len) xVal ← xVal + 1 len ← len + 1 }
xVal 1
yVal 0
len 1
Procedure Call Explanation
drawLine(x1, y1, x2, y2) Draws a line segment on a coordinate grid with endpoints at coordinates (x1, y1) and (x2, y2)
The drawLine procedure is to be used to draw the following figure on a coordinate grid.
Question
15
Mark for Review
Which of the following code segments can be used to draw the figure?
xVal 1
yVal 0
len 1
REPEAT 5 TIMES
{
drawLine(xVal, yVal, xVal, yVal + len)
xVal xVal + 1
len len + 1
}
Option A,xVal ← 1 yVal ← 0 len ← 1 REPEAT 5 TIMES { drawLine(xVal, yVal, xVal, yVal + len) xVal ← xVal + 1 len ← len + 1 }
xVal 1
yVal 0
len 1
Answers
Answered by
GPT-4o mini
To determine if the provided code segment can be used to draw a specific figure, let's analyze the code step by step.
1. **Initialization:**
- `xVal` starts at 1.
- `yVal` starts at 0.
- `len` starts at 1.
2. **Repeating the drawing process:**
The `REPEAT 5 TIMES` loop means that the following actions will be performed five times.
3. **Inside the loop:**
- The `drawLine(xVal, yVal, xVal, yVal + len)` command draws a vertical line segment that starts at the point `(xVal, yVal)` and ends at `(xVal, yVal + len)`.
- Initially, since `yVal` is 0 and `len` is 1, the first line drawn will be from `(1, 0)` to `(1, 1)`.
- After each line is drawn, `xVal` is incremented by 1 and `len` is incremented by 1.
4. **What happens in each iteration:**
- **1st iteration:** Draws from `(1, 0)` to `(1, 1)` (length 1).
- **2nd iteration:** Draws from `(2, 0)` to `(2, 2)` (length 2).
- **3rd iteration:** Draws from `(3, 0)` to `(3, 3)` (length 3).
- **4th iteration:** Draws from `(4, 0)` to `(4, 4)` (length 4).
- **5th iteration:** Draws from `(5, 0)` to `(5, 5)` (length 5).
As the `xVal` increments by 1 each time and `len` increments from 1 to 5, this effectively creates a series of vertical lines that will be spaced out horizontally on the x-axis while their heights increase successively.
### Conclusion
If your goal was to generate a figure with vertical lines that increases in length for each successive line while moving to the right on the x-axis, then the provided code segment (as described above) is appropriate.
Without seeing the actual figure that is meant to be drawn, I cannot confirm if it will produce the desired shape, but based on the provided description of the drawing procedure and the functionality of the code, it appears to be correctly constructed to execute a simple pattern of vertical lines.
If you need a specific figure check (e.g., triangles, squares, or other specific geometry), please provide the image or description of the intended figure for a more accurate analysis.
1. **Initialization:**
- `xVal` starts at 1.
- `yVal` starts at 0.
- `len` starts at 1.
2. **Repeating the drawing process:**
The `REPEAT 5 TIMES` loop means that the following actions will be performed five times.
3. **Inside the loop:**
- The `drawLine(xVal, yVal, xVal, yVal + len)` command draws a vertical line segment that starts at the point `(xVal, yVal)` and ends at `(xVal, yVal + len)`.
- Initially, since `yVal` is 0 and `len` is 1, the first line drawn will be from `(1, 0)` to `(1, 1)`.
- After each line is drawn, `xVal` is incremented by 1 and `len` is incremented by 1.
4. **What happens in each iteration:**
- **1st iteration:** Draws from `(1, 0)` to `(1, 1)` (length 1).
- **2nd iteration:** Draws from `(2, 0)` to `(2, 2)` (length 2).
- **3rd iteration:** Draws from `(3, 0)` to `(3, 3)` (length 3).
- **4th iteration:** Draws from `(4, 0)` to `(4, 4)` (length 4).
- **5th iteration:** Draws from `(5, 0)` to `(5, 5)` (length 5).
As the `xVal` increments by 1 each time and `len` increments from 1 to 5, this effectively creates a series of vertical lines that will be spaced out horizontally on the x-axis while their heights increase successively.
### Conclusion
If your goal was to generate a figure with vertical lines that increases in length for each successive line while moving to the right on the x-axis, then the provided code segment (as described above) is appropriate.
Without seeing the actual figure that is meant to be drawn, I cannot confirm if it will produce the desired shape, but based on the provided description of the drawing procedure and the functionality of the code, it appears to be correctly constructed to execute a simple pattern of vertical lines.
If you need a specific figure check (e.g., triangles, squares, or other specific geometry), please provide the image or description of the intended figure for a more accurate analysis.