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

int main () {

   int tmp;
   int sumatotal=0;
   /*
   do{
        printf("Dame 1 numero\n");
        scanf("%d",&tmp);
        getchar();
        if(tmp>=0){
            sumatotal+=tmp;
        }

   }while(tmp>=0);
   */
    printf("Dame 1 numero\n");
    scanf("%d",&tmp);
    getchar();
   while(tmp>=0){
       sumatotal+=tmp;
       printf("Dame 1 numero\n");
       scanf("%d",&tmp);
       getchar();
   }

   printf("Sumatotal = %d\n",sumatotal);

   getchar();
   return(0);
}