只是试图检查输入是否是布尔变量(1或0)。
然而,每当触发while循环时(即不输入1或0),它就会跳过并表示条件为真。
我希望用户能够在输入错误后重新输入他们的输入。我该怎么做呢?
我的代码:
int main() {
bool a,b,c;
cout << "This program will determine the value of the condition !(a||b) && c " << endl;
cout << "Please enter boolean values for a, b, and c. (0=F, 1=T) ";
cin >> a;
while (cin.fail())
{
cin.ignore(1000,'|n');
cin.clear();
cout << "Error: Enter only 0 or 1" << endl;
cout << "Enter in a new value for a" << endl;
}
cin >> b;
cin >> c;
cout << "The condition !(xx||xx)&&xx ";
if(!(a||b) && c)
{
cout << "is true";
}
else
{
cout << "is false";
}
return 0;
}
你需要把cin >> a;
放在while循环的末尾。
cin.clear()
将删除错误,然后while循环将停止。
一样:
cin >> a;
while (cin.fail())
{
cin.clear();
cin.ignore(1000,'n');
cout << "Error: Enter only 0 or 1" << endl;
cout << "Enter in a new value for a" << endl;
cin >> a;
}