依據下面程式判斷執行後每一個變數內容為何? char a='A', b=127; a+=2; ++b; cout << a << " , " << (int) b << endl; char 'A' + 2，就是往下第2個 ASCII 碼 char = 127 再+1 會循環至 -128 判斷下面程式碼中的運算式，運算子 +，為何種資料型態加法運算? char a='A'; int b=3; float c=2; double d=1; c = a + 'B'; b = b + 1; b = b + 1.0; d = (c + 9)/3; d = (c + 9)/3.0; c = c + d; d = a + b * c; c = a + 'B'; // int + b = b + 1; // int + b = b + 1.0; //double + d = (c + 9)/3; //float + d = (c + 9)/3.0; //double + c = c + d; // double + d = a + b * c; //float + 下列程式碼 cout 螢幕會出現何值? int a=21, b=3; a = (++b)*2; cout << a << endl; b *= 5; cout << b << endl; a = b % a; cout << a << endl; a = (b –= 4)*2; cout << a << endl; 下列程式碼 cout 螢幕會出現何值? (了解布林型態之整數運算) bool a=false; int b=1; a = a+b; cout << a << endl; b += a; cout << b << endl; cout << false << endl; int a = 3 , b = 2; cout << a << ++a << endl; cout << a+b << (b += ++a) << ++a << endl; cout << a << b << (a = b = 2) << (a = b = 3) << endl; cout << a << (b -= a++) << a++ << endl;