交一下这个程序该怎么设计
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define LEN 15
#define N 70
struct tagStudent
{
char chName[LEN+1];
int nAge;
char chSex;
char chNum[LEN+1];
float score[6];
} stu[N];
int k = 1, n = 0, m = 0;
void Instruction();
void InputStudent();
void OrderStudent();
void SaveStudent();
void DisplayStudent();
int ReadStudent();
void SearchStudent();
void ModifyStudent();
void DeleteStudent();
int main()
{
printf("欢迎使用学生档案管理系统\n");
while (k)
{
int num;
printf("\t请选择功能列表\n");
printf("\t\t0.系统说明\n");
printf("\t\t1.录入学生信息\n");
printf("\t\t2.将学生进行排序\n");
printf("\t\t3.保存学生信息\n");
printf("\t\t4.读取学生信息\n");
printf("\t\t5.显示全部学生信息\n");
printf("\t\t6.查找学生信息\n");
printf("\t\t7.修改学生信息\n");
printf("\t\t8.删除学生信息\n");
printf("\t\t9.退出系统\n");
scanf("%d", &num);
printf("%d",num);
switch (num)
{
case 0:
Instruction();
break;
case 1:
InputStudent();
break;
case 2:
OrderStudent();
break;
case 3:
SaveStudent();
break;
case 4:
ReadStudent();
break;
case 5:
DisplayStudent();
break;
case 6:
SearchStudent();
break;
case 7:
ModifyStudent();
break;
case 8:
DeleteStudent();
break;
case 9:
k = 0;
printf("即将退出系统!\n");
break;
default:
printf("请在0-9之间进行选择！\n");
}
}
system("pause");
return 0;
}
void Instruction()
{
printf("\n0.欢迎使用系统说明\n");
printf("\n1.请选择菜单上的数字\n");
printf("\n2.修改学生信息后请保存\n");
printf("\n3.谢谢使用\n");
}
void InputStudent()
{
int i = n, j, flag;
printf("请输入待增加的学生数:\n");
scanf("%d", &m);
if (m > 0)
{
do
{
flag = 1;
while (flag)
{
flag = 0;
printf("请输入第%d位学生的学号:\n", i + 1);
scanf("%s", stu[i].chNum);
for (j = 0; j < i; j++)
{
if (strcmp(stu[i].chNum, stu[j].chNum) == 0)
{
printf("该学号已存在，请重新输入！\n");
flag = 1;
break;
}
}
}
printf("请输入第%d 个学生的姓名:\n", i + 1);
scanf("%s", &stu[i].chName);
printf("请输入第%d 个学生的年龄:\n", i + 1);
scanf("%d", &stu[i].nAge);
printf("请输入第%d 个学生的性别:\n", i + 1);
scanf(" %c", &stu[i].chSex);
printf("请输入第%d 个学生的C语言成绩\n", i + 1);
scanf("%f", &stu[i].score[0]);
printf("请输入第%d 个学生的高数成绩:\n", i + 1);
scanf("%f", &stu[i].score[1]);
printf("请输入第%d 个学生的英语成绩:\n", i + 1);
scanf("%f", &stu[i].score[2]);
printf("请输入第%d 个学生的现代成绩:\n", i + 1);
scanf("%f", &stu[i].score[3]);
printf("请输入第%d 个学生的大物成绩:\n", i + 1);
scanf("%f", &stu[i].score[4]);
printf("请输入第%d 个学生的电路成绩:\n", i + 1);
scanf("%f", &stu[i].score[5]);
if (0 == flag)
{
i++;
}
}
while (i < n + m);
}
n += m;
printf("学生信息录入完毕！！！\n");
system("pause");
}
void OrderStudent()
{
int i, j, k, * p, * q, s;
char temp[LEN + 1], ctemp;
float ftemp;
for (i = 0; i < n - 1; i++)
{
for (j = n - 1; j > i; j--)
if (strcmp(stu[j - 1].chNum, stu[j].chNum) > 0)
{
strcpy(temp, stu[j - 1].chNum);
strcpy(stu[j - 1].chNum, stu[j].chNum);
strcpy(stu[j].chNum, temp);
strcpy(temp, stu[j - 1].chName);
strcpy(stu[j - 1].chName, stu[j].chName);
strcpy(stu[j].chName, temp);
ctemp = stu[j - 1].chSex;
stu[j - 1].chSex = stu[j].chSex;
stu[j].chSex = ctemp;
p = &stu[j - 1].nAge;
q = &stu[j].nAge;
s = *q;
*q = *p;
*p = s;
for (k = 0; k < 6; k++)
{
ftemp = stu[j - 1].score[k];
stu[j - 1].score[k] = stu[j].score[k];
stu[j].score[k] = ftemp;
}
}
}
}
void SaveStudent()
{
int i;
FILE* fp;
char filename[LEN + 1];
printf("请输入要保存的文件名：\n");
scanf("%s", filename);
fp = fopen(filename, "w");
for (i = 0; i < n; i++) {
fprintf(fp, "%s%s%d%c%.lf%.lf%.lf\n", stu[i].chNum, stu[i].chName, stu[i].nAge, stu[i].chSex,
stu[i].score[0], stu[i].score[1], stu[i].score[2], stu[i].score[3], stu[i].score[4], stu[i].score[5]);
}
printf("保存成功！！！\n");
fclose(fp);
system("pause");
}
int ReadStudent()
{
char filename[LEN + 1];
int i = 0;
int j = 0;
FILE* fp;
printf("请输入要读取学生信息的文件名：\n");
scanf("%s", filename);
if ((fp = fopen(filename, "r")) == NULL)
return 0;
while (fscanf(fp, "%s %s %d %s %d %d %d %d %d %d ", &stu[j].chNum, &stu[j].chName, &stu[j].nAge, &stu[j].chSex, &stu[j].score[0], &stu[j].score[1], &stu[j].score[2], &stu[j].score[3], &stu[j].score[4], &stu[j].score[5]) == 10)
{
j++;
}
n = j;
return n;
}
void DisplayStudent()
{
int i;
printf("共有%d位学生的信息:\n", n);
if (0 != n)
{
printf("学生学号 \t学生姓名 \t年龄 \t性别 \tC语言\t高数\t英语\t线代\t大物\t电路\n");
printf("--------------------------------------------------------------------\n");
for (i = 0; i < n; i++)
{
printf("%s \t%s \t%d \t%c \t%.1f \t%.1f\t%.1f\t%.1f\t%.1f\t%.1f\n", stu[i].chNum, stu[i].chName, stu[i].nAge, stu[i].chSex, stu[i].score[0], stu[i].score[1], stu[i].score[2], stu[i].score[3], stu[i].score[4], stu[i].score[5]);
}
}
system("pause");
}
void SearchStudent()
{
int i, item, flag;
char s1[21];
printf("------------------\n");
printf("-----1.按学号查询-----\n");
printf("-----2.按姓名查询-----\n");
printf("-----3.退出本菜单-----\n");
printf("------------------\n");
while (1)
{
printf("请选择子菜单编号:");
scanf("%d", &item);
flag = 0;
switch (item)
{
case 1:
printf("请输入要查询的学生的学号:\n");
scanf("%s", s1);
for (i = 0; i < n; i++)
if (strcmp(s1, stu[i].chNum) == 0)
{
flag = 1;
printf("学生学号\t学生姓名\t年龄\t性别\tC语言\t高数\t英语\t现代\t大物\t电路\n");
printf("--------------------------------------------------------------------\n");
printf("%s\t%s\t%d\t%6c\t%.1f\t%.1f\t%.1f\t%.1f\t%.1f\t%.1f\n", stu[i].chNum, stu[i].chName, stu[i].nAge, stu[i].chSex, stu[i].score[0], stu[i].score[1], stu[i].score[2], stu[i].score[3], stu[i].score[4], stu[i].score[5]);
}
if (0 == flag)
printf("该学号不存在！\n");
break;
case 2:
printf("请输入要查询的学生的姓名:\n");
scanf("%s", s1);
for (i = 0; i < n; i++)
if (strcmp(stu[i].chName, s1) == 0)
{
flag = 1;
printf("学生学号\t学生姓名\t年龄\t性别\tC语言\t高数\t英语\t现代\t大物\t电路\n");
printf("--------------------------------------------------------------------\n");
printf("%s\t%s\t%d\t%c\t%.1f\t%.1f\t%.1f\t%.1f\t%.1f\t%.1f\n", stu[i].chNum, stu[i].chName, stu[i].nAge, stu[i].chSex, stu[i].score[0], stu[i].score[1], stu[i].score[2], stu[i].score[3], stu[i].score[4], stu[i].score[5]);
}
if (0 == flag)
printf("该姓名不存在！\n");
break;
case 3:
return;
default:
printf("请在1-3之间选择\n");
}
}
}
void ModifyStudent()
{
int i, item, num = -1;
char sex1, s1[LEN + 1], s2[LEN + 1];
float score1;
printf("请输入要要修改的学生的学号:\n");
scanf("%s", s1);
for (i = 0; i < n; i++) {
if (strcmp(stu[i].chNum, s1) == 0)
{
num = i;
printf("------------------\n");
printf("1.修改姓名\n");
printf("2.修改年龄\n");
printf("3.修改性别\n");
printf("4.修改C语言成绩\n");
printf("5.修改高数成绩\n");
printf("6.修改英语成绩\n");
printf("7.修改现代成绩\n");
printf("8.修改大物成绩\n");
printf("9.修改电路成绩\n");
printf("10.退出本菜单\n");
printf("------------------\n");
while (1)
{
printf("请选择子菜单编号:");
scanf("%d", &item);
switch (item)
{
case 1:
printf("请输入新的姓名:\n");
scanf("%s", s2);
strcpy(stu[num].chName, s2);
break;
case 2:
printf("请输入新的年龄:\n");
scanf("%d", stu[num].nAge);
break;
case 3:
printf("请输入新的性别:\n");
scanf("%s", &sex1);
stu[i].chSex = sex1;
break;
case 4:
printf("请输入新的C语言成绩:\n");
scanf("%f", &score1);
stu[num].score[0] = score1;
break;
case 5:
printf("请输入新的高数成绩:\n");
scanf("%f", &score1);
stu[num].score[1] = score1;
break;
case 6:
printf("请输入新的英语成绩:\n");
scanf("%f", &score1);
stu[num].score[2] = score1;
break;
case 7:
printf("请输入新的现代成绩:\n");
scanf("%f", &score1);
stu[num].score[3] = score1;
break;
case 8:
printf("请输入新的大物成绩:\n");
scanf("%f", &score1);
stu[num].score[4] = score1;
break;
case 9:
printf("请输入新的电路成绩:\n");
scanf("%f", &score1);
stu[num].score[5] = score1;
break;
case 10:
return;
default:
printf("请在1-10之间选择\n");
}
}
printf("修改完毕！请及时保存！\n");
}
else
{
printf("没有该学生学号!!!");
}
}
}
void DeleteStudent()
{
int i, j, flag = 0;
char s1[LEN + 1];
printf("请输入要删除学生的学号:\n");
scanf("%s", s1);
for (i = 0; i < n; i++) {
if (strcmp(stu[i].chNum, s1) == 0)
{
flag = 1;
for (j = i; j < n - 1; j++)
{
stu[j] = stu[j + 1];
}
}
}
if (0 == flag)
{
printf("该学号不存在!!!\n");
}
if (1 == flag)
{
printf("删除成功！！！");
n--;
}
system("pause");
}
参考我写的这个学生成绩系统，你做一些修改，就能满足你的需求了。
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