用c++编写程序，输入上网的时间计算上网费用，计算的方法如下： 【25元 ＜10小时 费用 =每小时 2.5元 10~50小时 [每小时2元 ≥50小时 同时，为了鼓励多上网，每月收费最多不超过 130元。 要求：使用 switch 语句编程。

#include <stdio.h>

int main() {
int hours;
float fee;

printf("请输入上网时间（小时）：");
scanf("%d", &hours);

switch (hours) {
case 0:
fee = 0;
break;
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
case 8:
case 9:
fee = hours * 2.5;
break;
case 10:
case 11:
case 12:
case 13:
case 14:
case 15:
case 16:
case 17:
case 18:
case 19:
case 20:
case 21:
case 22:
case 23:
case 24:
case 25:
case 26:
case 27:
case 28:
case 29:
case 30:
case 31:
case 32:
case 33:
case 34:
case 35:
case 36:
case 37:
case 38:
case 39:
case 40:
case 41:
case 42:
case 43:
case 44:
case 45:
case 46:
case 47:
case 48:
case 49:
case 50:
fee = hours * 2;
break;
default:
fee = 50 * 2 + (hours - 50) * 1.5;
break;
}

if (fee > 130) {
fee = 130;
}

printf("上网费用为：%.2f元\n", fee);

return 0;
}