Coin Changing in C

#include<stdio.h>
void coinchange(int c[],int n,int s)
{
    int i,num;
    while(s>0){
        for(i=0;i<n;i++){
            if(c[i]<=s) break;
        }
        num=s/c[i];
        printf("%d * %d = %d\n",c[i],num,c[i]*num);
        s=s-(num*c[i]);
    }
}
int main()
{
    int c[6]={100,50,20,10,5,1};
    int n=6;
    printf("Enter your money: ");
    int x;
    scanf("%d",&x);
    coinchange(c,n,x);
}