#include <stdio.h> #include<string.h> #include<stdlib.h> struct student { char name[10]; char number[10]; char class1[5]; char class2[5]; char class3[5]; float average; }; int X;int num=0; struct student Stu[1000]; int addstu() { while(1) { printf("请输入学号，名字，成绩1，成绩2，成绩3\n"); scanf("%s%s%s%s%s",Stu[num].number,Stu[num].name,Stu[num].class1,Stu[num].class2,Stu[num].class3); double grade1=atoi(Stu[num].class1); double grade2=atoi(Stu[num].class2); double grade3=atoi(Stu[num].class3); Stu[num].average=(grade1+grade2+grade3)/3; num++; printf("是否添加？"); getchar(); if (getchar()=='n') { break; } } return num; } void stu_display(int i) { printf("%8s,%s,%s,%s,%s",Stu[i].number,Stu[i].name,Stu[i].class1,Stu[i].class2,Stu[i].class3); } int stu_findnumber(char number[]) { int i; for(i=0;i<num;i++) { if(strcmp(Stu[i].number, number)==0) { return i; } } return -1; } void stu_find() { while(1) { char number[20]; int index; printf("请输入学号"); scanf("%s",number); getchar(); index=stu_findnumber(number); if(index==-1){ printf("学生不存在"); } else{ printf("学号，姓名，课程1成绩，课程2成绩，课程3成绩分别为"); stu_display(index); } break; } } void Stu_sort() { int i,j; struct student x; for(i=0;i<num-1;i++) { for(j=1;j<num-i;j++) { if(Stu[j-1].average<Stu[j].average) { x=Stu[j-1]; Stu[j-1]=Stu[j]; Stu[j]=x; } } } printf("排序后的结果学号，姓名，课程1成绩，课程2成绩，课程3成绩分别为\n"); for(int q=0;q<num;q++) { stu_display(q); } } int main() { while(1) { printf(" 学生成绩管理系统 \n"); printf(" 1、成绩录入\n"); printf(" 2、成绩查询\n"); printf(" 3、成绩统计\n"); printf(" 4、退出系统\n"); printf("请选择1-4\n "); scanf("%d",&X); getchar(); switch(X) { case 1: addstu(); break; case 2: stu_find(); break; case 3: Stu_sort(); break; case 4: exit(0); break; } } }此程序中各函数之间的调用关系

该程序中各函数之间的调用关系如下：

1. main函数调用addstu、stu_find、Stu_sort函数；
2. addstu函数内部调用stu_display函数；
3. stu_find函数内部调用stu_findnumber和stu_display函数；
4. Stu_sort函数内部调用stu_display函数。

相关问题

修改程序：#include <stdio.h> #include <stdlib.h> #include <string.h> #define Element 6 struct Student { char name[8]; char id[12]; int sex; int age; float total_gpa; } student[Element]; int main() { int i; FILE *fp; if ((fp = fopen("stu.dat", "rb")) == NULL) { printf("Can't open file!\n"); exit(0); } for(i=0;i<Element;i++) { fread(&student[i],sizeof(struct student_type),6,fp); printf("%-10s% %4s %4d %4d %-15f\n",student[i].id, student[i].name, student[i].sex, student[i].age, student[i].total_gpa) } fclose(fp); return 0; }

修改程序如下：

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

#define Element 6 

struct Student {     
    char name[8];     
    char id[12];     
    int sex;     
    int age;     
    float total_gpa; 
} student[Element]; 

int main() {     
    int i;     
    FILE *fp; 

    if ((fp = fopen("stu.dat", "rb")) == NULL) {         
        printf("Can't open file!\n");         
        exit(0);     
    } 

    for(i = 0; i < Element; i++) {         
        fread(&student[i], sizeof(struct Student), 1, fp);         
        printf("%-10s %-8s %4d %4d %-15f\n", student[i].id, student[i].name, student[i].sex, student[i].age, student[i].total_gpa);     
    } 

    fclose(fp);     
    return 0; 
}

修改点如下：

1. 结构体名称应该与定义的一致，即 `student` 而不是 `student_type`；
2. 在 `fread` 中，`sizeof(struct student_type)` 应该改为 `sizeof(struct Student)`，且第三个参数应该为 1 而不是 6；
3. 在 `printf` 中，`% %4s` 应该改为 `%-8s`，即输出 `name` 时保证对齐；
4. `printf` 格式化字符串中，`%-10s` 后应该有一个空格，即输出 `id` 时保证对齐。

#include<stdio.h> #include<stdlib.h> #include<string.h> #include<windows.h> struct stu { int id; char name[10]; float grade[11]; float sum; float average; float gpa; struct stu* next; };按照这个结构体来续写C语言代码。要求将学生信息保存在硬盘文件中，通过制定文件路径和文件名称来导入学生信息；按照学号对所有学生信息进行升序、降序排列，并输出到屏幕显示或输出到文件

好的，以下是续写的代码：

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

struct stu {
    int id;
    char name[10];
    float grade[11];
    float sum;
    float average;
    float gpa;
    struct stu* next;
};

void saveToFile(struct stu* head, char* fileName) {
    FILE* fp = fopen(fileName, "wb");
    if (fp == NULL) {
        printf("Failed to open file!\n");
        return;
    }
    struct stu* p = head;
    while (p != NULL) {
        fwrite(p, sizeof(struct stu), 1, fp);
        p = p->next;
    }
    fclose(fp);
    printf("Successfully saved to file!\n");
}

struct stu* readFromFile(char* fileName) {
    FILE* fp = fopen(fileName, "rb");
    if (fp == NULL) {
        printf("Failed to open file!\n");
        return NULL;
    }
    struct stu* head = NULL, *p = NULL, *q = NULL;
    while (!feof(fp)) {
        p = (struct stu*)malloc(sizeof(struct stu));
        if (p == NULL) {
            printf("Memory allocation failed!\n");
            return NULL;
        }
        fread(p, sizeof(struct stu), 1, fp);
        if (p->id == 0) {
            free(p);
            break;
        }
        p->next = NULL;
        if (head == NULL) {
            head = p;
        }
        else {
            q->next = p;
        }
        q = p;
    }
    fclose(fp);
    printf("Successfully read from file!\n");
    return head;
}

void printList(struct stu* head) {
    if (head == NULL) {
        printf("The list is empty!\n");
        return;
    }
    printf("ID\tName\tGrade1\tGrade2\tGrade3\tGrade4\tGrade5\tGrade6\tGrade7\tGrade8\tGrade9\tGrade10\tSum\tAverage\tGPA\n");
    struct stu* p = head;
    while (p != NULL) {
        printf("%d\t%s\t", p->id, p->name);
        for (int i = 0; i < 10; i++) {
            printf("%.2f\t", p->grade[i]);
        }
        printf("%.2f\t%.2f\t%.2f\n", p->sum, p->average, p->gpa);
        p = p->next;
    }
}

void swap(struct stu* a, struct stu* b) {
    struct stu temp = *a;
    *a = *b;
    *b = temp;
}

void sortList(struct stu* head, int order) {
    if (head == NULL) {
        printf("The list is empty!\n");
        return;
    }
    int count = 0;
    struct stu* p = head;
    while (p != NULL) {
        count++;
        p = p->next;
    }
    for (int i = 0; i < count - 1; i++) {
        p = head;
        for (int j = 0; j < count - i - 1; j++) {
            if (order == 1) {
                if (p->id > p->next->id) {
                    swap(p, p->next);
                }
            }
            else {
                if (p->id < p->next->id) {
                    swap(p, p->next);
                }
            }
            p = p->next;
        }
    }
    printf("Successfully sorted!\n");
}

int main() {
    struct stu* head = NULL;
    char fileName[100];
    int choice, order;
    while (1) {
        system("cls");
        printf("1. Import student information from file\n");
        printf("2. Save student information to file\n");
        printf("3. Print student information\n");
        printf("4. Sort student information by ID in ascending order\n");
        printf("5. Sort student information by ID in descending order\n");
        printf("6. Exit\n");
        printf("Please enter your choice: ");
        scanf_s("%d", &choice);
        switch (choice) {
        case 1:
            printf("Please enter the file path and name: ");
            scanf_s("%s", fileName, 100);
            head = readFromFile(fileName);
            Sleep(2000);
            break;
        case 2:
            printf("Please enter the file path and name: ");
            scanf_s("%s", fileName, 100);
            saveToFile(head, fileName);
            Sleep(2000);
            break;
        case 3:
            printList(head);
            system("pause");
            break;
        case 4:
            sortList(head, 1);
            system("pause");
            break;
        case 5:
            sortList(head, 2);
            system("pause");
            break;
        case 6:
            printf("Goodbye!\n");
            return 0;
        default:
            printf("Invalid choice!\n");
            Sleep(1000);
            break;
        }
    }
    return 0;
}

这段代码实现了以下功能：

1. 将学生信息保存到硬盘文件中，并通过指定文件路径和文件名称来导入学生信息。
2. 按照学号对所有学生信息进行升序、降序排列，并输出到屏幕显示或输出到文件。
3. 通过菜单的方式来选择要执行的操作。

希望对你有所帮助！