我要勇敢地追逐我的世界.我的夢...

#include using namespace std; int main() { int a,b; char input; Start: cout <<"請輸入第一個數值:"; cin >>a; cout <<"請輸入第二個數值:"; cin >>b; cout <<"請輸入運算符號"; cin >>input; switch(input) { case '+': cout << a << input << b << "=" << a+b << endl; break; case '-': cout << a << input << b << "=" << a-b << endl; break; case '*': cout << a << input << b << "=" << a*b << endl; break; case '/': cout << a << input << b << "=" << a/b << endl; break; default: //注意default前面不用加case cout << "無效輸入" << endl; break; } goto Start; return 0; }