- #include<iostream>
- #include<cstdlib>
- using namespace std;
- int main()
- {
- a:
- int x;
- cout<<"請輸入你的成績:";
- cin>>x;
- switch(x)
- { case 80 ... 100:
- cout<<"甲等!"<<endl;
- break;
- case 70 ... 79:
- cout<<"乙等!"<<endl;
- break;
- case 60 ... 69:
- cout<<"丙等!"<<endl;
- break;
- case 0 ... 59:
- cout<<"不及格!"<<endl;
- break;
- default:
- cout<<"輸入錯誤."<<endl;
- }
- goto a;
- system("pause");
- return 0;
- }
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