布尔值始终为 false

Question

我正在创建一个图书存档程序，其中一个数据成员说这本书是否已读。但是我无法让程序将 "Yes" 写入屏幕，所以我猜它永远不会改变，即使当被问及我是否读过这本书时我说 'Y' 。谁能看出我做错了什么？

cout << "\n\tEnter title of book: ";
cin >> title;
cout << "\tEnter author of book: ";
cin >> author;
cout << "\tEnter genre of book (1. Crime, 2. Sports, 3. Science, 4. Drama): ";
cin >> choice;
switch(choice)
{
    case 1: genre = crime;   break;
    case 2: genre = sports;  break;
    case 3: genre = science; break;
    case 4: genre = drama;   break;
}
cout << "\tEnter year of publication: ";
cin >> yearPublished;
cout << "\tHave you read the book? (Y/N): ";
cin >> ch;
if(toupper(ch) == 'Y')
{
    haveRead == true;
}
else
{
    haveRead == false;
}

Answer 1

haveRead == true

是比较，不是赋值。从两个子句中删除一个 =

if(toupper(ch) == 'Y')
    haveRead = true;
else
    haveRead = false;

Answer 2

运算符==是比较运算符，用来比较事物。这里你只想赋值，所以你需要赋值运算符 =.

布尔值始终为 false

Boolean value always false

c++

boolean