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If and while statement problem (Beginner)
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//This program will ask the user for k, m and n.
//k should not be equal to 1.
//Output all numbers multiple by k between m and n. (ex. k=2,m=5,n=20 output should be 6 8 10...18)
*problem*
How to exit this program when the user assigned k to 1 ?
And why is it that when i assign an even-number to k it will output until n. And n should not appear on the screen. Actually this was already answered by our teacher but i want to know how.
//k should not be equal to 1.
//Output all numbers multiple by k between m and n. (ex. k=2,m=5,n=20 output should be 6 8 10...18)
*problem*
How to exit this program when the user assigned k to 1 ?
And why is it that when i assign an even-number to k it will output until n. And n should not appear on the screen. Actually this was already answered by our teacher but i want to know how.
#include <stdio.h>
int main()
{
int k, m, n;
printf("Enter a value for k: ");
scanf("%d",&k);
printf("Enter a value for m: ");
scanf("%d",&m);
printf("Enter a value for n: ");
scanf("%d",&n);
if (k <= 1 )
printf("k should not be equal to one \n");
if ( m < n)
{
while ( m < n )
{
m=m+1;
if ((m%k)==0)
{
printf("\n %d",m);
}
}
}
if (m>n)
printf("\n m should not be greater to n");
getchar();
getchar();
return 0;
} Last edited by DoEds; Jul 14th, 2009 at 10:46 am.
Oh i figured out the problem when k is assign to 1.
if ( k <= 1)
printf("\n k should not be equal to 1");
if (k > 1 && m < n)
{
while (k > 1 && m < n )
{
m=m+1; Last edited by DoEds; Jul 14th, 2009 at 10:42 am.
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Join Date: Feb 2009
Posts: 1,968
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Why would you want to wrap this if around the while:
As you can see both conditions are the same, so you can leave out this if 
Edit::
Like this:
This is possible because the instructions in the while loop's body will only get executed when the condition is true (in this case the condition is: k > 1 && m < n, so if this condition isn't true at the beginning of the while loop, your program will just skip over all the instructions inside the loop's body, and proceed executing the first statement after the while loop (if there's one))
if (k > 1 && m < n) { while(k > 1 && m < n) { } }
Edit::
Like this:
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Last edited by tux4life; Jul 14th, 2009 at 11:01 am. Reason: fix broken code tag
"Never argue with idiots, they just drag you down to their level and then beat you with experience."
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Originally Posted by DoEds 
*problem*
How to exit this program when the user assigned k to 1 ?
http://www.cprogramming.com/fod/exit.html
My blog on .NET- http://dotnet.tekyt.info
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Join Date: Feb 2009
Posts: 1,968
Reputation:
Solved Threads: 214
Possible, but if your main function contains your whole program, then I would rather suggest you to use:
return exit_code; instead of the exit() function Last edited by tux4life; Jul 14th, 2009 at 11:18 am.
"Never argue with idiots, they just drag you down to their level and then beat you with experience."
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