C++使用qsort时发生异常: std::bad_alloc

Question

异常：
0x00007FFE65F7474C 处(位于 EmployeePayrollManagementSystem.exe 中)有未经处理的异常: Microsoft C++ 异常: std::bad_alloc，位于内存位置 0x0000005EDECFDA30 处。

刚入坑，第一次遇到这个异常，且使用qsort次数不多，不熟练，不知如何处理。
问题应该主要在于qsort中的比较函数，在向比较函数中传参时失败：

问题部分代码：
排序函数sorts中截取的相关部分：（people类我放在最后面）

void sorts(std::vector<People>arr) {//部分无用参数我去掉了
    qsort(&arr, arr.size(), sizeof(People), ascendingName);
}

相关的比较函数：

int ascendingName(const void* a, const void* b) {
    People* t1 = (People*)a;
    People* t2 = (People*)b;
    return t1->getName() > t2->getName() ? 1 : -1;
}

People类：

class People
{
public:
    typedef struct changedSalary {
        std::string time;
        std::string money;
    }changedSalary;
private:
    std::string name, sex, age, position, serviceLength, number, salary, positionOrder;
    std::vector<changedSalary> cSalary;
public:
    //构造器
    People() {}
    People(std::string name) {
        setName(name);
    }
    People(std::string name, std::string number) {
        setName(name); setNumber(number);
    }
    People(std::string name, std::string number, std::string salary) {
        setName(name); setNumber(number); setSalary(salary);
    }
    People(std::string name, std::string number, std::string salary, std::string position) {
        setName(name); setNumber(number); setSalary(salary); setPosition(position);
    }
    //名字
    void setName(std::string name) {
        this->name = name;
    }
    std::string getName() {
        return name;
    }
    //性别
    void setSex(std::string sex) {
        this->sex = sex;
    }
    std::string getSex() {
        return sex;
    }
    //年龄
    void setAge(std::string age) {
        this->age = age;
    }
    std::string getAge() {
        return age;
    }
    //职位
    void setPosition(std::string position) {
        this->position = position;
    }
    std::string getPosition() {
        return position;
    }
    //职位大小顺序
    void setPositionOrder(std::string order) {
        positionOrder = order;
    }
    std::string getPositionOrder() {
        return positionOrder;
    }
    //工龄
    void setServiceLength(std::string length) {
        serviceLength = length;
    }
    std::string getServiceLength() {
        return serviceLength;
    }
    //电话
    void setNumber(std::string number) {
        this->number = number;
    }
    std::string getNumber() {
        return number;
    }
    //薪资
    void setSalary(std::string salary) {
        this->salary = salary;
    }
    std::string getSalary() {
        return salary;
    }
    //薪资变化
    void setChangedSalary(std::vector<changedSalary> changedSalary) {
        cSalary = changedSalary;
    }
    std::vector<changedSalary> getChangedSalary() {
        return cSalary;
    }
};

Answer 1

这样写，话说sort不香吗？

qsort(&arr[0],arr.size(),sizeof(int), compare);