//pe12-2b.c
#include <stdio.h>
#include "pe12-2a.h"
int main(void)
{
int mode;
printf("Enter 0 for metric mode, 1 for US mode: ");
scanf("%d", &mode);
while (mode >= 0)
{
set_mode(mode);
get_info();
show_info();
printf("Enter 0 for metric mode, 1 for US mode");
printf(" (-1 to quit): ");
scanf("%d", &mode);
}
printf("Done.\n");return 0;
}
//pe12-2a.h
void set_mode(int mode);
void get_info(void);
void show_info(void);
//pe12-2a.c
#include "pe12-2a.h"
#include <stdio.h>
static float distance=0.0;
static float fuel_consumed=0.0;
static int Mode;
void set_mode(int mode)
{
if(mode == 1 || mode == 0)//只有输入正确才保存到Mode
Mode=mode;
}
void get_info(void)
{
if(Mode==0)
{
printf("Enter distance traveled in kilometers:");
scanf("%f",&distance);
printf("Enter fuel consumed in liters: ");
scanf("%f",&fuel_consumed);
}
else if(Mode==1)
{
printf("Enter distance traveled in miles:");
scanf("%f",&distance);
printf("Enter fuel consumed in gallons: ");
scanf("%f",&fuel_consumed);
}
}
void show_info(void)
{
if(Mode==0)
printf("Fuel consumption is %.2f liters per 100 km.\n",fuel_consumed/distance*100);
else if(Mode==1)
printf("Fuel consumption is %.1f miles per gallon.\n",distance/fuel_consumed);
}