Indicate the variables used, draw an IPO chart and write an algorithm to solve the problem.
Test your algorithm by doing a trace table.
• Enter the number of rows of tables in the city hall as well as the number of Tables per row.
• Calculate and display the total number of Tables in the hall.
Lacking data.
To solve this problem, we need to indicate the variables used, draw an IPO chart, write an algorithm, and test it using a trace table.
1. Variables Used:
- numRows: integer (number of rows of tables in the city hall)
- tablesPerRow: integer (number of tables per row)
- totalTables: integer (total number of tables in the hall)
2. IPO (Input-Process-Output) Chart:
```
INPUT: numRows, tablesPerRow
PROCESS: Calculate totalTables = numRows * tablesPerRow
OUTPUT: totalTables
```
3. Algorithm:
```
1. Start
2. Read numRows
3. Read tablesPerRow
4. Set totalTables = numRows * tablesPerRow
5. Display totalTables
6. Stop
```
4. Trace Table:
Let's take an example where numRows = 5 and tablesPerRow = 8.
| Step | numRows | tablesPerRow | totalTables |
|------|---------|--------------|-------------|
| 1 | - | - | - |
| 2 | 5 | - | - |
| 3 | 5 | 8 | - |
| 4 | 5 | 8 | 40 |
| 5 | 5 | 8 | 40 |
| 6 | 5 | 8 | - |
The algorithm reads the values for numRows and tablesPerRow, then calculates the total number of tables by multiplying the two values. Finally, it displays the total number of tables as output.
By following this algorithm, you can solve the problem and determine the total number of tables in the city hall.