我有一个系统,用户可以根据需要输入尽可能多的输入并进行一些计算。使用Switch C++获取用户输入
这里是实现这一任务的代码:
int main() {
char op = 's';
float time=0, fuel_rate=0, start=0, end=0, pace=0;
while(op != 'x'){
cout << "Please select: " << endl;
cout << "1 ---> A" << endl;
cout << "2 ---> B" << endl;
cout << "3 ---> Calculate" << endl;
cout << "x ---> Exit" << endl;
op = std::getchar();
//remove the rest of the line from input stream
int temp;
while ((temp = std::getchar()) != '\n' && temp != EOF);
switch(op){
case '1':
cout << "Enter time: ";
cin >> time;
cout << "Enter fuel rate: ";
cin >> fuel_rate;
break;
case '2':
cout << "Enter start: ";
cin >> start;
cout << "Enter end: ";
cin >> end;
cout << "Enter pace: ";
cin >> pace;
cout << "Enter fuel rate: ";
cin >> fuel_rate;
break;
case '3':
cout << "Total value";
break;
case 'x':
return 0;
default:
continue;
}
}
return 0;
}
系统非常适用于第一个输入。示例控制台日志如下所示:
Please select:
1 ---> A
2 ---> B
3 ---> Calculate
x ---> Exit
1
Enter time: 2
Enter fuel rate: 3
Please select:
1 ---> A
2 ---> B
3 ---> Calculate
x ---> Exit
2
Please select:
1 ---> A
2 ---> B
3 ---> Calculate
x ---> Exit
第一个用户进入操作1,系统询问时间和燃油率。当用户进入操作2时,系统不要求开始,结束或步调。
关于如何解决这个问题的任何想法?