12 replies to this topic

[Lesser_Intellect]

Could someone help me with this please.

Write a program that will prompt the user for three integers. The program should then find the difference between the largest and smallest integers. The program should also calculate the sum of the three inegers and also their product and average. Display to the user difference, sum, product and average.
N.B The user should not be able to enter the same number more than once. Your program should be user friendly.

Print "Greetings"
Process_three_integers_of_different_values
INPUT "Please enter an integer."
N1
INPUT "Please enter another different integer."
N2
INPUT "Please enter another different integer."
N3

set sum to zero

IF (N1>N2 & N1>N3)

largest=N1;

ELSE IF(N2>N3 & N2>N1)

largest=N2;

ELSE
largest=N3;

IF(N1<N2 & N1<N3)

smallest=N1;

ELSE IF(N2<N3 & N2<N1)

smallest=N2;

ELSE
smallest=N3;

difference = largest - smallest
sum = N1 + N2 + N3
product = N1*N2*N3
average = sum/3

Edited by Lesser_Intellect, 01 November 2009 - 03:43 PM.

[WingedPanther]

What is your question? It doesn't fully meet the requirements, but it's not clear what you want help with.

[Lesser_Intellect]

Where it starts "write a program"... I just want my program checked, please.

[WingedPanther]

You haven't enforced entering three different numbers.

[Lesser_Intellect]

Thanks. I don't know how to 'enforce' it.

Print "Greetings"
Process_three_integers_of_different_values
INPUT "Please enter an integer."
N1
INPUT "Please enter another different integer."
N2
INPUT "Please enter another different integer."
N3

set sum to zero
set largest to N1
set smallest to N1

IF (N2>largest)

largest=N2;

IF(N3>largest)

largest=N3;

IF(N2<smallest)

smallest=N2;

IF(N3<smallest)
smallest=N3;
ENDIF
ENDIF
ENDIF
ENDIF

difference = largest - smallest
sum = N1 + N2 + N3
product = N1*N2*N3
average = sum/3
Display difference, sum, product, average.
END

[Natrobius]

What winged is saying is that your program does not check to make sure that the input received from the user is a valid number, instead of a character or the like. You need to add code to validate the user input or your program may crash when incorrect input is received. At the very least it will give unpredictable results.

[Lesser_Intellect]

Natrobius said:

What winged is saying is that your program does not check to make sure that the input received from the user is a valid number, instead of a character or the like. You need to add code to validate the user input or your program may crash when incorrect input is received. At the very least it will give unpredictable results.

How do I check to make sure that the input received from the user is a valid number?

[WingedPanther]

You'll have to use a while loop for each input after the first, checking to make sure you don't have duplicate values.

[Lesser_Intellect]

Print "Greetings"
Process_three_integers_of_different_values
INPUT "Please enter an integer."
N1
WHILE N1 > 0
INPUT "Please enter another different integer."
N2
WHILE N2 > 0
INPUT "Please enter another different integer."
N3
WHILE N3 > 0

set sum to zero
set largest to N1
set smallest to N1

IF (N2>largest)

largest=N2;

IF(N3>largest)

largest=N3;

IF(N2<smallest)

smallest=N2;

IF(N3<smallest)
smallest=N3;
ENDIF
ENDIF
ENDIF
ENDIF

difference = largest - smallest
sum = N1 + N2 + N3
product = N1*N2*N3
average = sum/3
Display difference, sum, product, average.
END

[WingedPanther]

Not quite:

Print "Greetings"
Process_three_integers_of_different_values
INPUT "Please enter an integer."
N1
do 
  INPUT "Please enter another different integer."
  N2
until N2 <> N1
do
  INPUT "Please enter another different integer."
  N3
until n3 <> n2 and n3 <> n1

set sum to zero
set largest to N1
set smallest to N1

IF (N2>largest)

largest=N2;

IF(N3>largest)

largest=N3;

IF(N2<smallest)

smallest=N2;

IF(N3<smallest)
smallest=N3;
ENDIF
ENDIF
ENDIF
ENDIF

difference = largest - smallest
sum = N1 + N2 + N3
product = N1*N2*N3
average = sum/3
Display difference, sum, product, average.
END

[Lesser_Intellect]

What area needs correction?
I'm kinda guessing and spelling since I'm clueless to computer programming.

[WingedPanther]

Look at the changes I made to your code.