how would i be able to print the identifier and the integer like the others ones in the picture below. Could you help with this?
how would i be able to print the identifier and the integer like the others ones in the picture below. Could you help with this?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
how would i be able to print the identifier and the integer like the others ones in the picture below. Could you help with this?

Transcribed Image Text:The image displays a snippet of pseudocode, resembling a conditional loop structure, commonly used in computer programming. Here's a transcription of the code:
```
read KEY_READ
IDENT
while KEY_WHILE
IDENT
<= LEQUAL_OP
INT_LIT
do KEY_DO
{ LEFT_CBRACE
write KEY_WRITE
IDENT
IDENT
== ASSIGN_OP
IDENT
+ ADD_OP
INT_LIT
} RIGHT_CBRACE
}
```
### Explanation for an Educational Context:
1. **Keywords and Symbols**:
- **KEY_READ**: Represents an operation to read input.
- **IDENT**: Indicates an identifier, which could be a variable name.
- **KEY_WHILE**: Signifies the start of a while loop.
- **LEQUAL_OP**: Represents the less than or equal to comparison operator (`<=`).
- **INT_LIT**: Denotes an integer literal, a hard-coded integer value.
- **KEY_DO**: Used to introduce the block of code executed by the loop.
- **LEFT_CBRACE and RIGHT_CBRACE**: Symbols `{` and `}` are used to group statements.
2. **Operations**:
- **Assignment (ASSIGN_OP)**: Represents the `==` operator, which should be the assignment operator `=` in standard code.
- **Addition (ADD_OP)**: Symbolizes the addition operation (`+`).
3. **Program Structure**:
- **Read Operation**: The program starts by reading a value into an identifier.
- **While Loop**: Continues execution as long as a condition is met.
- **Loop Block**: Contains actions to execute during each iteration, including writing output and performing arithmetic operations.
This pseudocode illustrates basic control structures and operations found in many programming languages. It's a useful tool for understanding logic flow and algorithm development.
Expert Solution

Step 1: Algorithm of the program:
Algorithm:
- Read tokens from an input file.
- For each token:
- a. Check if it's an identifier (IDENT) by testing if it contains only alphabetic characters.
- b. If it's an identifier, classify it as "IDENT."
- c. Check if it's an integer (INT) by attempting to convert it to an integer.
- d. If it's an integer, classify it as "INT."
- e. Print the type and lexeme of the token.
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