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 2 years ago
Plzz help.
write a C++ program to find the factorial of a number using keyboard input.
 2 years ago
Plzz help. write a C++ program to find the factorial of a number using keyboard input.

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ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1Suppose if the entered number is 5 then your output should be as follows. 5*4*3*2*1=120. How do u do this.

adhokshaj
 2 years ago
Best ResponseYou've already chosen the best response.0int n; // this is user input long fact = 1; for (int i = n; i>0; i) { fact *= i; } cout<<fact; NOTE: Validate input (n>=0) before for loop.

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1output will b only 120 right?

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1My coding is this #include<iostream> using namespace std; void disfactorial(); int main() { disfactorial(); system("PAUSE"); return 0; } void disfactorial() { int num, fact=1; cout<<"Enter the number:"; cin>>num; for(int i=num;i>1;i) { fact=fact*i; } cout<<fact<<endl; }

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1When I enter 5 I get the output as 120. I want it to display 5*4*3*2*1=120. Hw can I edit my code to display this?

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1A suggestion would be to implement your user interaction within the main: int main() { int fact; cout<<"Enter the number:"; cin>>num; fact = disfactorial(num); cout<<"The factorial of " + 5 + " is " + fact<<endl; system("PAUSE"); return 0; } Then define your disfactorial() method like this: int disfactorial(num) { int fact = 1, i; for (i = 1; i<num; i++) { fact =fact * (i+1); } return fact; } The output of the for loop, if the user enters 5, should be: i=1: 1*2 i=2: 2*3 i=3: 6*4 i=4: 24*5

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1To fix your code to produce 120 as the output you would just need to change your loop: from this: for(int i=num;i>1;i) { fact=fact*i; } to this: for(int i=1;i<num;i++) { fact=fact*i+1; }

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1I dnt get the correct output.

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1I had some compilation errors, mixed java and c++ syntax. Try this: #include<iostream> using namespace std; int disfactorial(int x); int main() { int fact, num; cout<<"Enter the number:"; cin>>num; fact = disfactorial(num); cout<<"The factorial of " << 5 << " is " << fact<<endl; return 0; } int disfactorial(int num) { int fact = 1, i; for (i = 1; i<num; i++) { fact =fact * (i+1); } return fact; }

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1input: 5 output: Enter the number:The factorial of 5 is 120

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1I got the same output for my coding above.

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1I changed ur code and only compiled bt didnt get the output.

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1If you are getting 120 as the factorial of 5, which it is, then I must have misunderstood the question, I apologize. What were you having difficulty with?

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1I want the output like this 5*4*3*2*1=120 Nt jst 120

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1OH! You are looking at formatting..

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1With the smaller numbers it will be simple to just hard code them, but you could always create an array the size of your "num" and set each index as you step through your for loop. However you should consider that if this code were to be used on a large number, say 50, you would have text scrolling across the screen.

ajprincess
 2 years ago
Best ResponseYou've already chosen the best response.1it's true. Thanxxxxxxxxxxxx a lot

agdgdgdgwngo
 2 years ago
Best ResponseYou've already chosen the best response.0the factorial grows really fast, so you get integer overflow once you go after about 20! or something

agdgdgdgwngo
 2 years ago
Best ResponseYou've already chosen the best response.0I wonder if C++ has bignums included in the library.

eSpeX
 2 years ago
Best ResponseYou've already chosen the best response.1I'm fairly certain they have long unsigned double, that's fairly big. :)
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