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Feb 23rd, 2003

0

Factorial?

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can anyone come up with a solution for this ? real quick for me?

the factorial of a nonnegative integer n is written n! ("n factorial") and is defined as follows: n!=n*(n-1)*(n-2)*.....*1(for values of n greater than to 1)
and n!=1 (for n=0 or n=1).

For example, 5!=5*4*3*2*1, which is 120. Use a while structure for the following..write a program that reads a nonnegative integer and computes and prints its factorial.

If anyone could this for me thanks.

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Feb 23rd, 2003

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Re: Factorial?

C++ Syntax (Toggle Plain Text)
int x, factorial = 1;
cout << "Enter integer: ";
cin >> x;
if (x > 0)
{
     while (x > 0)
     {
          factorial *= x;
          x--;
     }
}
cout << "Factorial: " << factorial;
int x, factorial = 1;
cout << "Enter integer: ";
cin >> x;
if (x > 0)
{
     while (x > 0)
     {
          factorial *= x;
          x--;
     }
}
cout << "Factorial: " << factorial;

Untested, this might work.

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Feb 23rd, 2003

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Re: Factorial?

na doesn't work

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Feb 23rd, 2003

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Re: Factorial?

What output does it give?
Try int x;
int factorial=1; on two separate lines?

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Feb 23rd, 2003

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Re: Factorial?

Oops! Just realized
the last line should cout << factorial
not cout << x

edited post above to fix error

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Feb 23rd, 2003

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Re: Factorial?

Compiling...
3.cpp
C:\c++ storage\3.cpp(7) : error C2143: syntax error : missing ';' before '<<'
C:\c++ storage\3.cpp(7) : error C2501: 'cout' : missing storage-class or type specifiers
C:\c++ storage\3.cpp(7) : error C2143: syntax error : missing ';' before '<<'
C:\c++ storage\3.cpp(9) : error C2143: syntax error : missing ';' before '>>'
C:\c++ storage\3.cpp(9) : error C2501: 'cin' : missing storage-class or type specifiers
C:\c++ storage\3.cpp(9) : error C2143: syntax error : missing ';' before '>>'
C:\c++ storage\3.cpp(12) : error C2143: syntax error : missing ';' before 'if'
C:\c++ storage\3.cpp(13) : error C2143: syntax error : missing ';' before '{'
C:\c++ storage\3.cpp(13) : error C2447: missing function header (old-style formal list?)
C:\c++ storage\3.cpp(20) : error C2143: syntax error : missing ';' before '<<'
C:\c++ storage\3.cpp(20) : error C2501: 'cout' : missing storage-class or type specifiers
C:\c++ storage\3.cpp(20) : error C2086: 'cout' : redefinition
C:\c++ storage\3.cpp(20) : error C2143: syntax error : missing ';' before '<<'
Error executing cl.exe.

3.obj - 13 error(s), 0 warning(s)

???

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Feb 23rd, 2003

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Re: Factorial?

Make sure your whole program is enclosed in

C++ Syntax (Toggle Plain Text)
#include<iostream.h>
 
int main()
{
 
     [ CODE GOES HERE ]
 
     return (0);
}
#include<iostream.h>

int main()
{

     [ CODE GOES HERE ]

     return (0);
}

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Re: Factorial?

#include <iostream>

int main()
{

int x, factorial = 1;

cout << "Enter integer: ";

cin >> x;

if (x > 0)
{
while (x > 0)
{
factorial *= x;
x--;
}

cout << "Factorial: " << factorial;

return 0;
}

???

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Re: Factorial?

You're missing a } to end the if statement.

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Feb 24th, 2003

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Re: ?

Quote originally posted by fastcarz3 ...

can anyone come up with a solution for this ? real quick for me?

If anyone could this for me thanks.

That's the second piece of homework you've posted here asking for a solution, with no attempt on your own part to work it out yourself. And that's after I spent time to give you an approach to problem solving yesterday.

If you can't do the course go find something more suitable.

Bob

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