Im trying to print the lexeme when the IDENT and INT_LIT tokens are found like the other ones in the picture.
Im trying to print the lexeme when the IDENT and INT_LIT tokens are found like the other ones in the picture.
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
C++
Im trying to print the lexeme when the IDENT and INT_LIT tokens are found like the other ones in the picture.
Could you try helping me print the IDENT and the INT_LIT found?
Im using isalpha for identifiers and isdigit for the integers.
![The image contains a series of programming-related tokens that could be part of a script or pseudocode, often used in compiler design or programming language theory. Below is the transcription and a brief explanation:
1. **read KEY_READ**
- This likely indicates a read operation, where `KEY_READ` is a keyword for reading input.
2. **IDENT**
- `IDENT` stands for identifier, which typically represents a variable or function name.
3. **while KEY_WHILE**
- This represents the start of a while loop, with `KEY_WHILE` being the reserved keyword for the loop.
4. **IDENT**
- Another identifier, representing a variable or function used within the while loop condition.
5. **<= LEQUAL_OP**
- Comparison operation, where `LEQUAL_OP` signifies a "less than or equal to" operator.
6. **INT_LIT**
- `INT_LIT` stands for an integer literal, representing a constant integer value.
7. **do KEY_DO**
- Indicates the start of a do-while loop block, with `KEY_DO` being the keyword.
8. **{ LEFT_CBRACE**
- Denotes the opening of a code block, with `{` indicating the left curly brace.
9. **write KEY_WRITE**
- This denotes a write operation, where `KEY_WRITE` is a keyword for outputting data.
10. **IDENT**
- Another identifier used in the context of the write operation.
11. **IDENT**
- Yet another identifier, potentially acting on or outputting its associated value.
12. **== ASSIGN_OP**
- Assignment operation, where `ASSIGN_OP` signifies the assignment (`=`) operator; note: `==` typically signifies equality check.
13. **IDENT**
- Identifier potentially being assigned a value.
14. **+ ADD_OP**
- Addition operation, with `ADD_OP` indicating the addition (`+`) operator.
15. **INT_LIT**
- Another integer literal, representing a constant used in arithmetic operations.
16. **} RIGHT_CBRACE**
- Signifies the end of a code block with `}` as the right curly brace.
17. **}**
- Close of the outermost block.
This script outlines a simple loop structure performing read and write operations with conditional checks and basic arithmetic within a block of code.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F498b8773-1848-43c0-a897-aac159975133%2Ffbf6a0ba-7f9b-4e49-b01c-bee62599b4bf%2Fd8tnbga_processed.png&w=3840&q=75)
Transcribed Image Text:The image contains a series of programming-related tokens that could be part of a script or pseudocode, often used in compiler design or programming language theory. Below is the transcription and a brief explanation:
1. **read KEY_READ**
- This likely indicates a read operation, where `KEY_READ` is a keyword for reading input.
2. **IDENT**
- `IDENT` stands for identifier, which typically represents a variable or function name.
3. **while KEY_WHILE**
- This represents the start of a while loop, with `KEY_WHILE` being the reserved keyword for the loop.
4. **IDENT**
- Another identifier, representing a variable or function used within the while loop condition.
5. **<= LEQUAL_OP**
- Comparison operation, where `LEQUAL_OP` signifies a "less than or equal to" operator.
6. **INT_LIT**
- `INT_LIT` stands for an integer literal, representing a constant integer value.
7. **do KEY_DO**
- Indicates the start of a do-while loop block, with `KEY_DO` being the keyword.
8. **{ LEFT_CBRACE**
- Denotes the opening of a code block, with `{` indicating the left curly brace.
9. **write KEY_WRITE**
- This denotes a write operation, where `KEY_WRITE` is a keyword for outputting data.
10. **IDENT**
- Another identifier used in the context of the write operation.
11. **IDENT**
- Yet another identifier, potentially acting on or outputting its associated value.
12. **== ASSIGN_OP**
- Assignment operation, where `ASSIGN_OP` signifies the assignment (`=`) operator; note: `==` typically signifies equality check.
13. **IDENT**
- Identifier potentially being assigned a value.
14. **+ ADD_OP**
- Addition operation, with `ADD_OP` indicating the addition (`+`) operator.
15. **INT_LIT**
- Another integer literal, representing a constant used in arithmetic operations.
16. **} RIGHT_CBRACE**
- Signifies the end of a code block with `}` as the right curly brace.
17. **}**
- Close of the outermost block.
This script outlines a simple loop structure performing read and write operations with conditional checks and basic arithmetic within a block of code.
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