滿意答案

df4dfw5e56

2017.05.28

采納率：51%????等級：6

已幫助：106人

//僅作參考

#include "stdio.h"

#include "conio.h"

#include "stdlib.h"

#include "string.h"

int studentNum = 0;

#define MAXSTUDENT (1024)

#define CheckData()\

{\

if(!studentNum)\

{\

printf("沒有學生數據，按任意鍵返回……\n");\

getch();\

return;\

}\

}\

typedef struct Student

{

int id;

int cScore;

int mathScore;

}Student;

void ClearStudent(Student* student)

{

memset((void*)student,0,sizeof(*student));

}

void ShowMainMenu()

{

system("cls");

printf("1.增加記錄\n2.計算每個學生的總成績\n3.計算每門課程的平均成績\n4.按座號查詢學生的成績\n5.按總分排名\n6.輸出前n名的學生的成績\n7.修改成績\n0.退出\n");

}

void ShowCountScore(const Student* student)

{

system("cls");

CheckData();

for(int i = 0;i < studentNum;i++)

printf("學生%04d的總成績：%d\n",(student+i)->id,(student+i)->cScore+(student+i)->mathScore);

printf("\n按任意鍵繼續……");

getch();

}

void ShowClassAvg(const Student* student)

{

system("cls");

CheckData();

double sumc = 0;

double summath = 0;

for(int i = 0;i < studentNum;i++)

{

sumc += (student+i)->cScore;

summath += (student+i)->mathScore;

}

printf("C語言平均成績為：%lf\n",sumc/studentNum);

printf("數學平均成績為：%lf\n",summath/studentNum);

printf("\n按任意鍵繼續……");

getch();

}

void AddStudent(Student* student)

{

system("cls");

if(studentNum == MAXSTUDENT)

{

printf("人數已滿，按任意鍵返回……\n");

getch();

}

printf("分別錄入座號、C語言成績、數學成績：\n");

int id = 0;

int cScore = 0;

int mathScore = 0;

scanf("%d%d%d",id,cScore,mathScore);

for(int i = 0 ;i < studentNum;i++)

if((student+i)->id == id)

{

printf("座號重復，按任意鍵返回……\n");

getch();

return;

}

(student+studentNum)->id = id;

(student+studentNum)->cScore = cScore;

(student+studentNum)->mathScore = mathScore;

studentNum++;

}

void SelectFromID(const Student* student)

{

system("cls");

CheckData();

printf("輸入查詢ID:\n");

int id = 0;

scanf("%d",id);

printf("查詢結果:\n");

for(int i = 0;i

if(id == (student+i)->id)

{

printf("C語言成績為：%d\n數學成績為：%d\n",(student+i)->cScore,(student+i)->mathScore);

break;

}

printf("\n按任意鍵繼續……");

getch();

}

void SortForCount(Student* student)

{

system("cls");

CheckData();

for(int i = 0;i < studentNum;i++)

{

for(int j = studentNum -1;j > i;j--)

if(((student+j)->cScore+(student+j)->mathScore) > ((student+j-1)->cScore+(student+j-1)->mathScore))

{

Student stu;

stu = *(student+j);

*(student+j) = *(student+j-1);

*(student+j-1) = stu;

}

}

}

void SortForN(Student* student,int n)

{

SortForCount(student);

if(!studentNum)

return;

n = n>studentNum?studentNum:n;

for(int i = 0;i< n;i++)

printf("第%d名：\nID：%d\nC語言成績為：%d\n數學成績為：%d\n總分為：%d\n\n",i+1,(student+i)->id,(student+i)->cScore,(student+i)->mathScore,(student+i)->cScore+(student+i)->mathScore);

printf("\n按任意鍵繼續……");

getch();

}

void UpdateScore(Student* student)

{

system("cls");

CheckData();

printf("輸入修改ID:\n");

int id = 0;

scanf("%d",id);

int i = 0;

for(;i

if(id == (student+i)->id)

break;

if(i == studentNum)

printf("\n查無此人，按任意鍵繼續……");

else

{

printf("輸入欲修改的C語言成績、數學成績：\n");

int cScore = 0;

int mathScore = 0;

scanf("%d%d",cScore,mathScore);

(student+i)->cScore=cScore;

(student+i)->mathScore = mathScore;

printf("\n按任意鍵繼續……");

}

getch();

}

void RunStudent(Student* student)

{

while(1)

{

ShowMainMenu();

char chGet = getch();

switch(chGet)

{

case '1':

AddStudent(student);

break;

case '2':

ShowCountScore(student);

break;

case '3':

ShowClassAvg(student);

break;

case '4':

SelectFromID(student);

break;

case '5':

SortForCount(student);

for(int i =0;i

printf("第%d名：\nID：%d\nC語言成績為：%d\n數學成績為：%d\n總分為：%d\n\n",i+1,(student+i)->id,(student+i)->cScore,(student+i)->mathScore,(student+i)->cScore+(student+i)->mathScore);

printf("\n按任意鍵繼續……");

getch();

break;

case '6':

{

int n = 0;

printf("輸入N：\n");

scanf("%d",n);

SortForN(student,n);

}

break;

case '7':

UpdateScore(student);

break;

case '0':

return;

default:

break;

}

}

}

int main()

{

Student* allStudent = (Student*)malloc(MAXSTUDENT*sizeof(Student));

memset((void*)allStudent,0,MAXSTUDENT*sizeof(Student));

RunStudent(allStudent);

return 0;

}

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