?? testrev.c
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/* * File: testrev.c * --------------- * This program simply reads in an array of integers and then * display them elements in the original order. It is a test * program on the way to writing the reverse program. */#include <stdio.h>#include "genlib.h"#include "simpio.h"/* * Constants * --------- * MaxElements -- Maximum number of elements * Sentinel -- Value used to terminate input */#define MaxElements 250#define Sentinel 0/* Private function prototypes */static int GetIntegerArray(int array[], int max, int sentinel);static void PrintIntegerArray(int array[], int n);static void GiveInstructions(void);/* Main program */main(){ int list[MaxElements], n; n = GetIntegerArray(list, MaxElements, Sentinel); PrintIntegerArray(list, n);}/* * Function: GetIntegerArray * Usage: n = GetIntegerArray(array, max, sentinel); * ------------------------------------------------- * This function reads elements into an integer array by * reading values, one per line, from the keyboard. The end * of the input data is indicated by the parameter sentinel. * The caller is responsible for declaring the array and * passing it as a parameter, along with its allocated * size. The value returned is the number of elements * actually entered and therefore gives the effective size * of the array, which is typically less than the allocated * size given by max. If the user types in more than max * elements, GetIntegerArray generates an error. */static int GetIntegerArray(int array[], int max, int sentinel){ int n, value; n = 0; while (TRUE) { printf(" ? "); value = GetInteger(); if (value == sentinel) break; if (n == max) Error("Too many input items for array"); array[n] = value; n++; } return (n);}/* * Function: PrintIntegerArray * Usage: PrintIntegerArray(array, n); * ----------------------------------- * This function displays the first n values in array, * one per line, on the console. */static void PrintIntegerArray(int array[], int n){ int i; for (i = 0; i < n; i++) { printf("%d\n", array[i]); }}
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