factorial help!

hi guys, (yes i searched the internet and this forum for help but i dont need to have a user enter which number they want to calculate the factorial for. my program just needs to calculate the first 10 factorials.)

here's what i have so far. it compiles but gives an output of just 0.

Code:

---

#include <stdio.h>

main()

{
        int fact = 1;
        int i;
       
        for ( i = 1; i <=10; ++i )
                while(i>=1)
                {
                        fact = fact*i;
                        i = i-1;
                }
       
                printf("\n%d\n", fact);
       
                return 0;
}

---

any ideas where i went wrong?

fact = 10 * 1 + 10 * 2+ 10 * 3, etc.

is not the same as
fact = 10 * any one number from 1 to fact.

How about fact = fact + (fact * i), maybe?

The variable i should either increment up or decrement down, but not both. :)

You keep setting i back to zero before you break from the while loop. Try using another looping variable for the second loop.

also, your for loop is only executing the while loop. Even if you use a different variable for the for loop than the while loop (which you should), you will only ever print the very last number. You are not including the printf() in the for loop.

ok i tried what you guys said and heres what i have now.

Code:

---

#include <stdio.h>

main()

{
        int fact = 1;
        int counter = 10;
       
                while(counter>=1)
                {
                        fact = fact + (fact * counter);
                        counter--;
                        printf("\nN    N!\n%i    %i\n", counter,fact);
                }
       
        return 0;
}

---

however, the output is as follows:

N N!
9 11

N N!
8 110

N N!
7 990
.
.
.

-the output is wrong, but i cant figure out which equation to use...also, i need the output to looks as follows:

N N!
1 1
2 2
3 6
4 24
.
.
.
.
10 3628800

thanks for everyones help!

you need 1 loop

Code:

---

for(number = 1,fact = 1;number<10;number++)
{
  fact *= number;
  printf("%d %d\n", number, fact);
}

---

something like that

Quote:

---

Originally Posted by hockey1

hi guys, (yes i searched the internet and this forum for help but i dont need to have a user enter which number they want to calculate the factorial for. my program just needs to calculate the first 10 factorials.)

here's what i have so far. it compiles but gives an output of just 0.

Code:

---

#include <stdio.h>

main()

{
        int fact = 1;
        int i;
       
        for ( i = 1; i <=10; ++i )
                while(i>=1)
                {
                        fact = fact*i;
                        i = i-1;
                }
       
                printf("\n%d\n", fact);
       
                return 0;
}

---

any ideas where i went wrong?

---

Remove while loop..

Code:

---

main()

{
        int fact = 1;
        int i;
       
        for ( i = 1; i <=5; ++i )
        {
                        fact = fact*i;
       
  }
       
                printf("\n%d\n", fact);
       
    return 0;

---