Creating a Business Card Format with Assembly Code
How does the modified assembly code prompt the user for their address and city/state?
The modified assembly code prompts the user for their address and city/state by displaying a message asking them to enter their address and city/state respectively. It then reads the user input for each field and stores it in a buffer.
What does the `strlen` function do in the assembly code?
The `strlen` function calculates the length of the user input string in order to determine the number of characters in the input. This length is then used to print the user input in the business card format.
Prompting User Input:
The modified assembly code begins by printing a top border and then displaying a message asking the user to enter their address. It then reads the user input for the address and stores it in a buffer. Subsequently, it prompts the user for their city and state, reads the input, and stores it in the same buffer.
Calculating String Length:
The `strlen` function is used to calculate the length of the user input string. It works by iterating through the characters in the input string until it reaches the null terminator, counting the number of characters encountered. This length is crucial for printing the user input in the business card format.
The modified assembly code provided allows users to input their address and city/state, which is then printed in a business card format. The code includes sections for displaying a top and bottom border, prompting the user for their address and city/state, reading the user input, calculating string lengths, and printing the final business card layout.
By utilizing system calls in Linux, the code efficiently handles user input and output to create a professional-looking business card format. The `strlen` function plays a key role in determining the length of the user input, ensuring that the address and city/state information is displayed correctly within the borders of the business card layout.
This practical use of assembly code demonstrates how low-level programming languages can be leveraged to interact with users, process their input, and produce formatted output. The step-by-step process of prompting users for information and displaying it in a defined format showcases the precision and control that assembly programming offers.