It's suppose to take n children (imagine they are in a cirlce) and a prompted number (say 5) and starting from the 1st child and going round, count out every 5th child untill only one child is left in the ring.

For example for n=11, and coutout=5, the output is suppose to be 8.

for 10, 5, the output is suppose to be 3;

I get wrong numbers and it freezing though. Can't see what is wrong with the code either. The dry runs work well.

Code:

#include <stdio.h>
#include <conio.h>
int main(void) {
int ring[101]={0};
int x=0, count=0, cv, numchild, j;
int ringactive (int ring[], int size);
clrscr();
printf ("Enter number of chilren and countout value: ");
scanf ("%d %d", &numchild, &cv);
for (j=1; j<=numchild; j++)
ring[j]=1;
while ( ringactive(ring,numchild+1)==1) {
while (count<cv) {
if (x>=numchild) x=0;
x++;
if (ring[x]==0) x++;
else count++;}
ring[x]=0; count=0;}
for (j=1; j<=numchild; j++)
if (ring[j]==1) printf ("%d", j);
return 0;
}
int ringactive (int ring[], int size) {
int i, count=0;
for (i=1; i<size; i++)
if (ring[i]==1) count++;
if (count>1) return 1;
return 0; }