Odeluvanje cifri i suma na tie cifri

#include <stdio.h>
#include <stdlib.h>

int main()
{
int n,c1,broj=0,suma=0,z;
scanf("%d",&n);
while(n){
    c1=n%10;
    n/=10;
    z=broj*10+c1;
    suma+=z;
}
    printf("%d\n",suma);

return 0;
}