/* * File: addlist.c * --------------- * This program adds a list of numbers.  The end of the * input is indicated by entering 0 as a sentinel value. * This version of the implementation uses a while loop * without a break statement, which forces some duplication * of code. */#include <stdio.h>#include "genlib.h"#include "simpio.h"main(){    int value, total;    printf("This program adds a list of numbers.\n");    printf("Signal end of list with a 0.\n");    total = 0;    printf(" ? ");    value = GetInteger();    while (value != 0) {        total += value;        printf(" ? ");        value = GetInteger();    }    printf("The total is %d\n", total);}