C语言对学生成绩管理系统的分步代码

以下是一个简单的 C 语言学生成绩管理系统的分步代码：

1. 定义结构体

struct student {
    char name[50];
    int roll;
    float marks;
} s;

2. 添加学生信息

printf("Enter information of students:\n");

printf("Enter name: ");
scanf("%s", s.name);

printf("Enter roll number: ");
scanf("%d", &s.roll);

printf("Enter marks: ");
scanf("%f", &s.marks);

3. 显示学生信息

printf("Displaying Information:\n");
printf("Name: %s\n", s.name);
printf("Roll number: %d\n", s.roll);
printf("Marks: %.2f\n", s.marks);

4. 存储学生信息到文件

FILE *fptr;

fptr = fopen("students.txt", "wb");
fwrite(&s, sizeof(s), 1, fptr);
fclose(fptr);

5. 从文件读取学生信息

FILE *fptr;

fptr = fopen("students.txt", "rb");
fread(&s, sizeof(s), 1, fptr);
fclose(fptr);

6. 更新学生信息

printf("Enter new name: ");
scanf("%s", s.name);

printf("Enter new roll number: ");
scanf("%d", &s.roll);

printf("Enter new marks: ");
scanf("%f", &s.marks);

7. 删除学生信息

remove("students.txt");