Question

当年龄超出18-25岁时，我似乎无法将附加费变量等于0。

当输入包含附加费但程序附加费必须等于0时，程序运行正常，表示未初始化。

我的代码如下。

#include<iostream>

using namespace std;

int main()
{
int age, accidents, basic = 500, surcharge, program, total;
char safety;

cout << "Enter your age: " << endl;
cin >> age;

cout << "Enter # of accidents: " << endl;
cin >> accidents;

cout << "Did you attend a driver saftey program? y/n: ";
cin >> safety;

if (age < 18 || accidents >= 6)
{
    cout << "You are not eligible for insurance";
}
else

if (age >= 18 || age <= 25)
    surcharge = 100;
else
    surcharge == 0;


if (accidents == 1 && safety == 'n')
    program = 50;
else if (accidents == 2 && safety == 'n')
    program = 125;
else if (accidents == 3 && safety == 'n')
    program = 225;
else if (accidents == 4 && safety == 'n')
    program = 375;
else if (accidents == 5 && safety == 'n')
    program = 575;
// attended driver safety course
else if (accidents == 1 && safety == 'y')
    program = 35;
else if (accidents == 2 && safety == 'y')
    program = 100;
else if (accidents == 3 && safety == 'y')
    program = 200;
else if (accidents == 4 && safety == 'y')
    program = 325;
else if (accidents == 5 && safety == 'y')
    program = 500;
else
    program = 0;

total = basic + surcharge + program;

cout << "Your total is: " << total << endl;

getchar();
getchar();
return 0;
}

Answer 1

此时

if (age >= 18 || age <= 25)
    surcharge = 100;
else
    surcharge == 0;  // <--- here

我想你想写

    surcharge = 0;

Answer 2

如果要对其进行初始化，只需将其初始化即可。更改以下行

int age, accidents, basic = 500, surcharge, program, total;

到

int age, accidents, basic = 500, surcharge = 0, program, total;

Answer 3

我可以看到彼此附近有2个错误。你写道：

if (age >= 18 || age <= 25)
    surcharge = 100;
else
    surcharge == 0;

应该是：

if (age >= 18 && age <= 25)
    surcharge = 100;
else
    surcharge = 0;

您需要检查age >= 18 AND（&&）age <= 25而非OR（||）

另一个错误是surcharge == 0应该是surcharge = 0（你希望赋值不等）

如果你没有保险，你想在显示错误后退出程序，所以你应该考虑在打印错误信息后返回的地方进行更改：

if (age < 18 || accidents >= 6)
{
    cout << "You are not eligible for insurance" << endl;
    return 1; // A value > 0 usually denotes an error occurred
}

C ++'附加费'变量未正确设置

3 个答案: