有关算术溢出的一个错误

请大家看看这个程序，在VS里一直在报错这是为什么啊？而且为什么只有那一个地方报错下面的为啥不报错？

#include
using namespace std;
int main()
{
    int time;
    float wage_per_hour, wage;
    cout << "Please input employee’s work time and wage_per_hour:" << endl;
    cin >> time >> wage_per_hour;
    while (time)
    {
        if (time == 0)
            return 0;
        if (time > 0)
        {
            if (time <= 40)
                wage = time * wage_per_hour;
            if (time > 40)
                wage = 40 * wage_per_hour + (time - 40) * 1.5 * wage_per_hour;
            if (time > 50)
                wage = 50 * wage_per_hour + (time - 50) * 3 * wage_per_hour;
            cout << "The employee’s wage :" << wage << endl;
            cout << "Please input employee’s work time and wage_per_hour:";
            cin >> time >> wage_per_hour;
        }
    }
    system("pause");
}

1.5改成1.5f

• 可以看下c++参考手册中的 c语言-算术