Write a simple factorial calculator program. The program should perform the following: Step 1. Ask the user to enter a positive integer. Step 2. Check if the entered integer is positive or negative. If it is positive, perform Step 3; otherwise, display an appropriate error message and the program should stop. Step 3. Calculate the factorial of the entered positive integer and display the result. Note: The factorial of n is denoted by n! and calculated by the product of integer numbers from 1 to n. For example, the entered integer is 5, the calculation of its factorial is: 5! = 1 x 2 x 3 x 4 x 5 = 120. Step 4. Repeat Step 1 to Step 3 five (5) times. 5. Compile and execute the program. 6. Debug syntax and logical errors if there is any in the program. 7. The following is an example output: Factorial Calculator Enter a positive integer: 5 |5! %3D 1 х 2 х 3x4 х5 The factorial of 5 is: 120 Enter a positive integer: 4 |4! %3D 1 х 2 х 3х 4 The factorial of 4 is: 24 Enter a positive integer: -5 Invalid input! Program stopped! Figure 1: Example output with entered negative number

C++ Programming: From Problem Analysis to Program Design
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Chapter5: Control Structures Ii (repetition)
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In java langauge 

Factorial Calculator
Enter a positive integer: 2
2! = 1 x 2
The factorial of 2 is: 2
Enter a positive integer: 3
3! = 1 x 2 x 3
The factorial of 3 is: 6
Enter a positive integer: 4
4! = 1 x 2 x 3 x 4
The factorial of 4 is: 24
Enter a positive integer: 5
5! = 1 x 2 x 3 x 4 x 5
The factorial of 5 is: 120
Enter a positive integer: 6
6! = 1 x 2 x 3 x 4 x 5 x 6
The factorial of 6 is: 720
Figure 2: Example output of complete flow of the program
Transcribed Image Text:Factorial Calculator Enter a positive integer: 2 2! = 1 x 2 The factorial of 2 is: 2 Enter a positive integer: 3 3! = 1 x 2 x 3 The factorial of 3 is: 6 Enter a positive integer: 4 4! = 1 x 2 x 3 x 4 The factorial of 4 is: 24 Enter a positive integer: 5 5! = 1 x 2 x 3 x 4 x 5 The factorial of 5 is: 120 Enter a positive integer: 6 6! = 1 x 2 x 3 x 4 x 5 x 6 The factorial of 6 is: 720 Figure 2: Example output of complete flow of the program
4. Write a simple factorial calculator program. The program should perform the following:
Step 1. Ask the user to enter a positive integer.
Step 2. Check if the entered integer is positive or negative. If it is positive, perform Step 3; otherwise,
display an appropriate error message and the program should stop.
Step 3. Calculate the factorial of the entered positive integer and display the result.
Note: The factorial of n is denoted by n! and calculated by the product of integer numbers
from 1 to n. For example, the entered integer is 5, the calculation of its factorial is: 5! = 1 x
2 x 3 x 4 x 5 = 120.
Step 4. Repeat Step 1 to Step 3 five (5) times.
5. Compile and execute the program.
6. Debug syntax and logical errors if there is any in the program.
7. The following is an example output:
Factorial Calculator --
Enter a positive integer: 5
5! = 1 x 2 x 3 x 4 x 5
The factorial of 5 is: 120
Enter a positive integer: 4
4! = 1 x 2 x 3 x 4
The factorial of 4 is: 24
Enter a positive integer: -5
Invalid input! Program stopped!
Figure 1: Example output with entered negative number
Transcribed Image Text:4. Write a simple factorial calculator program. The program should perform the following: Step 1. Ask the user to enter a positive integer. Step 2. Check if the entered integer is positive or negative. If it is positive, perform Step 3; otherwise, display an appropriate error message and the program should stop. Step 3. Calculate the factorial of the entered positive integer and display the result. Note: The factorial of n is denoted by n! and calculated by the product of integer numbers from 1 to n. For example, the entered integer is 5, the calculation of its factorial is: 5! = 1 x 2 x 3 x 4 x 5 = 120. Step 4. Repeat Step 1 to Step 3 five (5) times. 5. Compile and execute the program. 6. Debug syntax and logical errors if there is any in the program. 7. The following is an example output: Factorial Calculator -- Enter a positive integer: 5 5! = 1 x 2 x 3 x 4 x 5 The factorial of 5 is: 120 Enter a positive integer: 4 4! = 1 x 2 x 3 x 4 The factorial of 4 is: 24 Enter a positive integer: -5 Invalid input! Program stopped! Figure 1: Example output with entered negative number
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D. S. Malik
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