用结构体来做学生工作信息管理系统
这个是题目及其要求，要求使用结构体的知识来做，可以使用指针，最好加一点注释
给你写过一个了啊，这个就是改成结构体数组就可以了
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct student
{
int number;
char* name;
float computer;
float math;
float english;
};
void display(struct student stu[], int n)
{
int i;
printf("%-10s %-10s %-10s %-10s %-10s\n", "No.", "Name", "Computer", "Math", "English");
for (i = 0; i < n; i++)
{
printf("%-10d %-10s", stu[i].number,stu[i].name);
printf(" %-10.1f %-10.1f %-10.1f\n", stu[i].computer,stu[i].math,stu[i].english);
}
}
void query(struct student stu[], int n)
{
int i, j, flag = 0;
int id;
printf("input a student ID: ");
scanf("%d", &id);
for (i = 0; i < n; i++)
{
if (id == stu[i].number)
{
flag = 1; //表示找到，输出学生信息
printf("%-10d %-10s", stu[i].number, stu[i].name);
printf(" %-10.1f %-10.1f %-10.1f\n", stu[i].computer, stu[i].math, stu[i].english);
break;
}
}
if (flag == 0)
printf("No such student\n"); //提示学生不存在
}
void update(struct student stu[], int n)
{
int i, flag = 0;
int id;
float sc;
char kc[10] = { 0 };
printf("input a student ID: ");
scanf("%ld", &id);
printf("input course name: ");
scanf("%s", kc);
for (i = 0; i < n; i++)
{
if (id == stu[i].number)
{
flag = 1; //表示找到，输出学生信息
printf("please input a score: ");
scanf("%f", &sc);
if (strcmp(kc, "English") == 0)
{
stu[i].english = sc;
flag = 2;
}
else if (strcmp(kc, "Computer") == 0)
{
stu[i].computer = sc;
flag = 2;
}
else if (strcmp(kc, "Math") == 0)
{
stu[i].math = sc;
flag = 2;
}
break;
}
}
if (flag == 0)
printf("No such student\n"); //提示学生不存在
else if (flag == 1)
printf("No such course\n"); //提示没有这门课程
else
display(stu, n);
}
void remove(struct student stu[], int* n)
{
int i, j, k, flag = 0;
int id;
printf("input a student ID: ");
scanf("%d", &id);
for (i = 0; i < *n; i++)
{
if (id == stu[i].number)
{
flag = 1; //表示找到，输出学生信息
free(stu[i].name);
stu[i].name = 0;
//前移
for (j = i; j < *n - 1; j++)
{
stu[j] = stu[j + 1];
}
*n = (*n) - 1;
break;
}
}
if (flag == 0)
printf("No such student\n"); //提示学生不存在
else
display(stu, *n); //显示删除后的信息
}
void add(struct student stu[], int* n)
{
int i, flag = 0;
long id;
float* tmp;
int n2 = *n;
while (1)
{
printf("input a student ID: ");
scanf("%d", &id);
for (i = 0; i < n2; i++)
{
if (id == stu[i].number)
{
flag = 1; //表示找到，输出学生信息
break;
}
}
if (flag == 0)
break;
else
printf("the Id has exist, please ");
}
stu[*n].number = id;
printf("input student name: ");
stu[*n].name = (char*)malloc(10);
scanf("%s", stu[*n].name);
printf("input Computer score: ");
scanf("%f", &stu[i].computer);
printf("input Math score: ");
scanf("%f", &stu[i].math);
printf("input English score: ");
scanf("%f", &stu[i].english);
*n = (*n) + 1; //学生数量+1
display(stu, *n);
}
int main()
{
char c;
struct student stu[10] = {
{20210101,NULL,60.5,97.0,90.5},
{20210102,NULL,88.5,67.5,88.1},
{20210103,NULL,72.3,75.0,92.0},
{20210104,NULL,66.8,86.0,45.5}
};
int stuNmb = 4; //学生数量
stu[0].name = (char*)malloc(10);
strcpy(stu[0].name, "Stu_01");
stu[1].name = (char*)malloc(10);
strcpy(stu[1].name, "Stu_02");
stu[2].name = (char*)malloc(10);
strcpy(stu[2].name, "Stu_03");
stu[3].name = (char*)malloc(10);
strcpy(stu[3].name, "Stu_04");
printf("d. show all information\n");
printf("q. search students' scores according to student ID numbers\n");
printf("u. modify the students' scores according to student ID numbers and course name\n");
printf("r. delete the students' information according to student ID numbers\n");
printf("a. add a student's information\n");
printf("e. exit\n");
while ((c = getchar()) != 'e') //input e to end the program
{
if (c == 'd')
{
display(stu, stuNmb);
}
else if (c == 'q')
{
query(stu, stuNmb);
}
else if (c == 'u')
{
update(stu, stuNmb);
}
else if (c == 'r')
{
remove(stu, &stuNmb);
}
else if (c == 'a')
{
add(stu, &stuNmb);
}
}
return 0;
}
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