Sum

#include <stdio.h>
#include <stdlib.h>
int main(void) {
  char *buf = (char *) malloc(BUFSIZ);
  char *p = buf;
  int i, sum = 0;
  do {
    for (i = 0; i < 8; i++) { scanf("%c", p); sum += *p; p++; }
    getchar();
  } while (sum % 10 != 0);
  p = '\0'; printf("%s\n", buf);
  return 0;
}