我是C++的新手，我看过类似的问题，不知道哪里出了问题。我知道这很简单，但我只是做一些随机的事情，希望它能运行。第23行的分号有错误。应为不合格-ID:23。我想它和分号有关，但我不知道它有什么问题。
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
int main()
{
const double income_limit_mo = 37750; // max income for missouri
const double income_limit_ks = 34500; // max income for kansas
const double credit_rate = 0.0975; // tax credit of 9.75%
char homeowner_status;
string state;
double income;
double credit_amount;
cout << "Are you a homeowner [Y/N]? ";
cin >> homeowner_status;
cout << endl;
if (homeowner_status == 'Y' || homeowner_status == 'y')
cout << "Resident State [MO or KS]: ";
cin >> state;}
{
if (state == "MO" || state == "Mo" || state == "mo")
{cout << " Amount of annual income: ";
cin >> income;
if (income <= income_limit_mo)
{ credit_amount = (income * credit_rate);
cout << "Allowed amount of credit: $ ";
cout << credit_amount;}
else
cout << "Applicant ineligible. Income too high";}
else if (state == "KS" || state == "Ks" || state == "ks")
{cout << "Amount of annual income: ";
if (income <= income_limit_ks)
{credit_amount = (income * credit_rate);
cout << "Allowed amount of credit: $ ";
cout << credit_amount;}
else
cout << "Applicant ineligible. Income too high";}
else
cout << "Applicant ineligible. Not Missouri or Kansas resident.";
else
cout << "Applicant ineligible. Not a homeowner."
return 0;
}
在第48行的末尾缺少了一个分号，但是你也有一个花括号的问题。这是我在修正后得到的结果，但是要注意你的if/else逻辑。我建议使用ALWALLE{和}花括号，即使对于1行if/else语句也是如此。
#include <iostream>
#include <string>
#include <iomanip>
using namespace std;
int main() {
const double income_limit_mo = 37750; // max income for missouri
const double income_limit_ks = 34500; // max income for kansas
const double credit_rate = 0.0975; // tax credit of 9.75%
char homeowner_status;
string state;
double income;
double credit_amount;
cout << "Are you a homeowner [Y/N]? ";
cin >> homeowner_status;
cout << endl;
if (homeowner_status == 'Y' || homeowner_status == 'y') {
cout << "Resident State [MO or KS]: ";
cin >> state;
if (state == "MO" || state == "Mo" || state == "mo") {
cout << " Amount of annual income: ";
cin >> income;
if (income <= income_limit_mo) {
credit_amount = (income * credit_rate);
cout << "Allowed amount of credit: $ ";
cout << credit_amount;
}
else
cout << "Applicant ineligible. Income too high";
}
else
if (state == "KS" || state == "Ks" || state == "ks") {
cout << "Amount of annual income: ";
if (income <= income_limit_ks) {
credit_amount = (income * credit_rate);
cout << "Allowed amount of credit: $ ";
cout << credit_amount;
}
else
cout << "Applicant ineligible. Income too high";
}
else
cout << "Applicant ineligible. Not Missouri or Kansas resident.";
}
else
cout << "Applicant ineligible. Not a homeowner.";
return 0;
}