Suppose that a variable customer of class Customer has been declared, instantiated and initialised. Write statement(s) in C#, using the properties, that will increase the customer’s number of orders by 1.
时间: 2024-03-02 18:47:59 浏览: 104
Assuming that the `Customer` class has a property `NumOrders` to store the number of orders made by the customer, you can increase the number of orders by 1 using the following statement in C#:
```
customer.NumOrders += 1;
```
This will increment the `NumOrders` property of the `customer` object by 1.
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The following fragment of C# includes the declarations of some properties:public class Customer{ private int numberOfOrders = 0; public int ID{ get{return numberOfOrders;} set{numberOfOrders = value;} } } Suppose that a variable customer of class Customer has been declared, instantiated and initialised. Write statement(s) in C#, using the properties, that will increase the customer’s number of orders by 1.
The provided code declares a property `ID` which actually gets and sets the `numberOfOrders` field. To increase the number of orders by 1, you should modify the `numberOfOrders` field directly. Here is the C# statement to increment the `numberOfOrders` field by 1:
```
customer.ID += 1;
```
This code will call the `set` accessor of the `ID` property and pass the incremented value of `numberOfOrders` to it, which will update the `numberOfOrders` field accordingly.
Objectives: To practice File and text input output concept 1. (Process scores in a text file) Suppose a text file contains an unspecified number of scores separated by spaces. Write a program that prompts the user to enter the file, reads the scores from the file, and displays their total and average. 2. (Write/read data) Write a program to create a file named Lab07_02.txt if it does not exist. Write 100 integers created randomly into the file using text I/O. Integers are separated by spaces in the file. Read the data back from the file and display the data in increasing order.
1. Here's the code to process scores in a text file:
```python
filename = input("Enter the file name: ")
try:
with open(filename, "r") as file:
scores = [int(score) for score in file.read().split()]
total = sum(scores)
average = total / len(scores)
print("Total: ", total)
print("Average: ", average)
except FileNotFoundError:
print("File not found.")
```
2. Here's the code to write/read data:
```python
import random
filename = "Lab07_02.txt"
try:
with open(filename, "x") as file:
data = [str(random.randint(1, 100)) for i in range(100)]
file.write(" ".join(data))
except FileExistsError:
pass
try:
with open(filename, "r") as file:
data = [int(num) for num in file.read().split()]
data.sort()
print(data)
except FileNotFoundError:
print("File not found.")
```
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