实现按照工资卡号升序、实发工资降序以及姓名字典序排序c

下面是一个示例代码，实现了按照工资卡号升序、实发工资降序、姓名字典序排序的功能：

#include <stdio.h>
#include <string.h>

#define MAX_EMPLOYEES 100

struct Employee {
    char name[50];
    int salaryCardNum;
    double netSalary;
};

int compareByCardNum(const void* a, const void* b) {
    const struct Employee* emp1 = (const struct Employee*)a;
    const struct Employee* emp2 = (const struct Employee*)b;
    return emp1->salaryCardNum - emp2->salaryCardNum;
}

int compareByNetSalary(const void* a, const void* b) {
    const struct Employee* emp1 = (const struct Employee*)a;
    const struct Employee* emp2 = (const struct Employee*)b;
    if (emp1->netSalary < emp2->netSalary) {
        return 1;
    } else if (emp1->netSalary > emp2->netSalary) {
        return -1;
    } else {
        return 0;
    }
}

int compareByName(const void* a, const void* b) {
    const struct Employee* emp1 = (const struct Employee*)a;
    const struct Employee* emp2 = (const struct Employee*)b;
    return strcmp(emp1->name, emp2->name);
}

int main() {
    struct Employee employees[MAX_EMPLOYEES];
    int numEmployees;

    // 从键盘输入员工信息
    printf("请输入员工个数：");
    scanf("%d", &numEmployees);
    for (int i = 0; i < numEmployees; i++) {
        printf("请输入第%d个员工信息（姓名 工资卡号 实发工资）：", i+1);
        scanf("%s %d %lf", employees[i].name, &employees[i].salaryCardNum, &employees[i].netSalary);
    }

    // 按照工资卡号升序排序
    qsort(employees, numEmployees, sizeof(struct Employee), compareByCardNum);

    // 找到相邻实发工资相同的员工区间，对每个区间按照姓名字典序排序
    int start = 0;
    for (int i = 1; i <= numEmployees; i++) {
        if (i == numEmployees || employees[i].netSalary != employees[start].netSalary) {
            qsort(&employees[start], i-start, sizeof(struct Employee), compareByName);
            start = i;
        }
    }

    // 按照实发工资降序排序
    qsort(employees, numEmployees, sizeof(struct Employee), compareByNetSalary);

    // 输出排序后的结果
    printf("排序后的结果为：\n");
    for (int i = 0; i < numEmployees; i++) {
        printf("%s %d %.2lf\n", employees[i].name, employees[i].salaryCardNum, employees[i].netSalary);
    }

    return 0;
}

这个程序使用了 C 标准库中的 `qsort` 函数来进行快速排序，同时定义了三个比较函数，分别用于按照工资卡号升序、实发工资降序、姓名字典序排序。在程序中，先按照工资卡号升序排序，然后找到相邻实发工资相同的员工区间，对每个区间按照姓名字典序排序，最后按照实发工资降序排序。