#include<stdio.h>
main()
{
int zipcode,numdem,numrep,sum ;
double perdem, perrep;
While(zipcode!= -1111){
printf("please enter zipcode");
scanf("%d",&zipcode);
printf("please enter numdem)'
scanf("%d",&numdem);
printf("please enter numrep");
scanf("%d",&numrep);
zipcode...