啊哈磊_编程从这里起步
标题:
求助
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作者:
策马横枪啸八荒
时间:
2020-12-23 16:45
标题:
求助
#include<stdio.h>
void main()
{int menu()
{double ElecCost(double x);
double WaterCost(double x);
double GasCost(double x);
printf("欢迎使用居民缴费系统");
menu()
}
double ElecCost (double x);
{double y;
if (x>=0&&x<=30);
y=0.8x;
if (x>30);
y=0.5x;
printf("%f",y);
}
void
menu ()
double WaterCost(double x);
{double y;
if(X>=0&&x<=15);
y=4*x/3;
if (x>15);
y=2.5*x-10.5;
printf("%f",y);
}
void
menu()
void
{
int n;
double x;
printf ("请输入数字1——3选择某个数");
printf ("1.电费缴费系统");
printf ("2.水费缴费系统");
printf ("3.燃气费缴费系统");
scanf ("%d ",&n);
switch(n)
{
case 1:
printf("请输入居民当月所用电量");
scanf("%f",&x);
ElecCost(x);
}
break;
case 2;
{
printf("请输入居民当月所用水量");
scanf ("%f",&x);
WaterCost(x);
}
break;
case 3;
{
printf("请输入居民当月所用燃气量");
scanf("%f",&x);
GasCost(x);
break;
}
}
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