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PLOTEMP4.C
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C/C++ Source or Header
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1992-02-18
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3KB
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130 lines
// Borland C++ - (C) Copyright 1991 by Borland International
/* PLOTEMP4.C--Example from Getting Started */
/* This program creates a table and a bar chart plot from a
set of temperature readings */
#include <conio.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
/* Prototypes */
void get_temps(void);
void table_view(void);
void min_max(int num_vals, int vals[], int *min_val, int *max_val);
float avg_temp(int num_vals, int vals[]);
void graph_view(void);
void save_temps(void);
void read_temps(void);
/* Global defines */
#define TRUE 1
#define READINGS 8
/* Global data structures */
int temps[READINGS];
int main(void)
{
while (TRUE)
{
printf("\nTemperature Plotting Program Menu\n");
printf("\tE - Enter temperatures for scratchpad\n");
printf("\tS - Store scratchpad to disk\n");
printf("\tR - Read disk file to scratchpad\n");
printf("\tT - Table view of current data\n");
printf("\tG - Graph view of current data\n");
printf("\tX - Exit the program\n");
printf("\nPress one of the above keys: ");
switch (toupper(getche()))
{
case 'E': get_temps(); break;
case 'S': save_temps(); break;
case 'R': read_temps(); break;
case 'T': table_view(); break;
case 'G': graph_view(); break;
case 'X': exit(0);
}
}
}
/* Function definitions */
void get_temps(void)
{
char inbuf[130];
int reading;
printf("\nEnter temperatures, one at a time.\n");
for (reading = 0; reading < READINGS; reading++)
{
printf("\nEnter reading # %d: ", reading + 1);
gets(inbuf);
sscanf(inbuf, "%d", &temps[reading]);
/* Show what was read */
printf("\nRead temps[%d] = %d", reading, temps[reading]);
}
}
void table_view(void)
{
int reading, min, max;
clrscr(); /* clear the screen */
printf("Reading\t\tTemperature(F)\n");
for(reading = 0; reading < READINGS; reading++)
printf("%d\t\t\t%d\n", reading + 1, temps[reading]);
min_max(READINGS, temps, &min, &max);
printf("Minimum temperature: %d\n", min);
printf("Maximum temperature: %d\n", max);
printf("Average temperature: %f\n", avg_temp(READINGS, temps));
}
void min_max(int num_vals, int vals[], int *min_val, int *max_val)
{
int reading;
*min_val = *max_val = vals[0];
for (reading = 1; reading < num_vals; reading++)
{
if (vals[reading] < *min_val)
*min_val = (int)&vals[reading];
else if (vals[reading] > *max_val)
*max_val = (int)&vals[reading];
}
}
float avg_temp(int num_vals, int vals[])
{
int reading, total = 1;
for (reading = 0; reading < num_vals; reading++)
total += vals[reading];
return (float) total/reading; /* reading equals total vals */
}
void graph_view(void)
{
printf("\nExecuting graph_view().\n");
}
void save_temps(void)
{
printf("\nExecuting save_temps().\n");
}
void read_temps(void)
{
printf("\nExecuting read_temps().\n");
}