#ifndef _TEACHER_H_ 
#define _TEACHER_H_ 
 
struct student 
{ 
 char name[20]; 
 int id; 
 char sex; 
 int chinese; 
 int math; 
}; 
 
typedef struct student stu; 
 
void show_message(stu *st, int len); 
 
int input(stu *st); 
 
void find(stu *st, int len); 
 
void sort(stu *st, int len); 
 
void out(stu *st, int i); 
 
void welcome(); 
 
void showchoice(); 
 
#endif 

#include <stdio.h> 
#include <string.h> 
#include "teacher.h" 
#include <stdlib.h> 
 
int main() 
{ 
 int len; 
 int m; 
 stu st[100]; 
  
 welcome(); 
 
 while(1) 
 { 
  showchoice(); 
   
  scanf("%d", &m); 
  switch(m) 
  { 
   case 1: len = input(st);break; 
   case 2: show_message(st , len);break; 
   case 3: find(st , len);break; 
   case 4: sort(st , len);break; 
   default : exit(0); 
  } 
 } 
 
 return 0; 
} 

#include <string.h> 
#include <stdio.h> 
#include "teacher.h" 
 
void welcome() //系統(tǒng)界面歡迎函數(shù) 
{ 
 system("clear"); 
  
 printf("*********************************\n"); 
 printf("WELCOME TO TEACHER SYSTEM!\n"); 
 printf("*********************************\n"); 
 sleep(2); 
  
} 
 
void showchoice() //選擇提示函數(shù) 
{ 
 //system("clear"); 
  
 printf("*********************************\n"); 
 printf("1 input!   2 showinfor!\n"); 
 printf("3 find!   4 sort!\n"); 
 printf("*********************************\n"); 
 printf("Please input your choice :\n"); 
  
} 
 
void out(stu *st, int i) //輸出第i個(gè)學(xué)生的信息 
{ 
 printf("%s ",st[i].name); 
 printf("%d ",st[i].id); 
 printf("%c ",st[i].sex); 
 printf("%d ",st[i].chinese); 
 printf("%d",st[i].math); 
 printf("\n"); 
} 
 
int input(stu *st) //錄入學(xué)生信息 
{ 
 int i; 
  
 printf("Input name, id, sex, Chinese score, Math score:\n"); 
 for(i = 0; i < 100; i++) 
 { 
  scanf("%s", st[i].name); 
  if((!strcmp(st[i].name , "end"))) 
  { 
   return i; 
  }  
  scanf("%d", &st[i].id); 
  scanf("%s", &st[i].sex); 
  scanf("%d", &st[i].chinese); 
  scanf("%d", &st[i].math); 
 } 
 return i; 
} 
 
void show_message(stu *st, int len) //輸出全部學(xué)生信息 
{ 
 int i; 
 printf("name, id, sex, Chinese score, Math score:\n"); 
 for(i = 0; i < len; i++) 
 { 
  out(st, i); 
 }  
} 
 
void find(stu *st,int len) //查找出特定學(xué)生信息 
{ 
 char tmp[20]; 
 int i; 
  
 printf("Please input the target student:\n"); 
 scanf("%s", tmp); 
 for(i = 0; i < len; i++ ) 
 { 
  if(!strcmp(st[i].name,tmp)) 
  { 
   out(st, i); 
  } 
 } 
} 
 
void sort(stu *st, int len) //將數(shù)學(xué)，語文成績(jī)冒泡排序 
{ 
 int tmp; 
 int i,j,k; 
 int id,sex,chinese,math; 
 char name[20]; 
 int choice; 
  
 printf("\n"); 
 printf("Please input your sort choice:\n"); //選擇提示：1 數(shù)學(xué)成績(jī)排序 2 語文成績(jī)排序  
 printf("1 math grade!  2 chinese grade!\n"); 
 printf("\n"); 
 scanf("%d",&choice); 
 
 if(1 == choice) 
 { 
  for(i = 0;i < len-1;i++) 
  { 
   for(j = 0;j < len-1-i;j++) 
   { 
    if(st[j].math > st[j+1].math) //將成績(jī)較大的學(xué)生信息放到成績(jī)較低的后面 
    { 
     tmp = st[j].math; 
     st[j].math = st[j+1].math; 
     st[j+1].math = tmp; 
     
     strcpy(name,st[j].name); 
     strcpy(st[j].name,st[j+1].name); 
     strcpy(st[j+1].name,name); 
     
     id = st[j].id; 
     st[j].id = st[j+1].id; 
     st[j+1].id = id; 
     
     sex = st[j].sex; 
     st[j].sex = st[j+1].sex; 
     st[j+1].sex = sex; 
     
     chinese = st[j].chinese; 
     st[j].chinese = st[j+1].chinese; 
     st[j+1].chinese = chinese; 
    } 
   } 
     
  } 
  
  printf("After sort math grade :\n"); 
  for(k = 0;k < len;k++) 
  { 
   out(st, k); 
  } 
 } 
 else if(2 == choice) 
 { 
  for(i = 0;i < len-1;i++) 
  { 
   for(j = 0;j < len-1-i;j++) 
   { 
    if(st[j].chinese > st[j+1].chinese) 
    { 
     tmp = st[j].chinese; 
     st[j].chinese = st[j+1].chinese; 
     st[j+1].chinese = tmp; 
    
     math = st[j].math; 
     st[j].math = st[j+1].math; 
     st[j+1].math = math; 
     
     strcpy(name,st[j].name); 
     strcpy(st[j].name,st[j+1].name); 
     strcpy(st[j+1].name,name); 
     
     id = st[j].id; 
     st[j].id = st[j+1].id; 
     st[j+1].id = id; 
      
     sex = st[j].sex; 
     st[j].sex = st[j+1].sex; 
     st[j+1].sex = sex; 
     
    
    } 
   } 
     
  } 
  
 printf("After sort chinese grade :\n"); 
 for(k = 0;k < len;k++) 
 { 
  out(st,k); 
 } 
} 
else 
 { 
  printf("Input error!\nPlease input again!\n"); 
 } 
  
}