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-------dyh--------#include
   
    #include
    
     using namespace std;struct student{	char  id[11];			//学生学号 	char  name[10];			//学生姓名 	char  xy[14];			//学院	int   c;	int   jd;	int   sx;	int   sm;		student *next;};void insert_student(student *s){	int i=1,n;	cout<<"\n 请输入所添加的学生人数:";	cin>>n;	student *q;		for(;i<=n;i++)	{		q=new student;		while(s->next!=NULL)		s=s->next;		s->next=q;		cout<<"c请输入第:"<
     <
      
       >q->id;		cout<
       
        >q->name;		cout<
        
         >q->xy; cout<
         
          >q->c; cout<
          
           >q->jd; cout<
           
            >q->sx; cout<
            
             sm=q->c+q->jd+q->sx; q->next=NULL; } } int out_student(student *s) { s=s->next; int i=1,t=0; while(s!=NULL) { cout<<"\n"<<"-----------"<
             <<"----------"<
              
               id; cout<
               
                name; cout<
                
                 xy; cout<
                 
                  c; cout<
                  
                   jd; cout<
                   
                    sx; cout<
                    
                     sm; cout<
                     
                      next; i++; cout<
                      
                       >id; while(l->next!=NULL) { if(strcmp(l->id,id)==0) break; l=l->next; } if(strcmp(l->id,id)==0) { cout<<"\n学号:"<
                       
                        id; cout<<"\n姓名:"<
                        
                         name; cout<<"\n学院:"; cin>>l->xy; cout<<"\nc语言:"; cin>>l->c; cout<<"\n计算机导论:"; cin>>l->jd; cout<<"\n数学:"; cin>>l->sx; l->sm=l->c+l->jd+l->sx; t=1; }else{ cout<<"\n没有此学生!"; t=0; } return t; }int select_student(student *l){ int t; char id[10]; cout<<"\n请输入要查询的学生学号:"; cin>>id; while(l->next!=NULL) { if(strcmp(l->id,id)==0) break; l=l->next; } if(strcmp(l->id,id)==0) { cout<<"\n学号:"<
                         
                          id; cout<<"\n姓名:"<
                          
                           name; cout<<"\n学院:"<
                           
                            xy; cout<<"\nc语言:"<
                            
                             c; cout<<"\n计算机导论:"<
                             
                              jd; cout<<"\n数学:"<
                              
                               sx; cout<<"\n总分:"<
                               
                                sm; t=1; }else{ cout<<"\n没有此学生!"; t=0; } return t;}int clear_student(student *s){int t; if(s->next!=NULL) //判断s是否为空 { s->next=NULL;//delete[]s; t=1; //清空成功 } else t=0; //失败 return t;}int main(){ student *s; s=new student; //开辟空间 s->next=NULL; int n; cout<<"============c++学生成绩管理============\n"; while(1) { cout<<"\n--------学生成绩查询设置--------"; cout<
                                
                                 1 、添加\n"; cout<<"\n----->2 、修改\n"; cout<<"\n----->3 、查学生成绩\n"; cout<<"\n----->4 、输出学生信息\n"; cout<<"\n----->5 、清空学生信息\n"; cout<<"\n----->0 、退出\n"; cout<<"\n -------------------------------"; cout<<"请选择:"; cin>>n; switch(n) { case 1: insert_student(s); cout<<"\n 添加成功...\n"; break; case 2: if(modify_student(s)) { cout<<"\n 添加成功...\n"; break; }else{ cout<<"\n 添加失败...\n"; break; } case 3: if(select_student(s)) { cout<<"\n 查询完毕..."; break; }else{ cout<<"\n 查询失败..."; break; } case 4: if(out_student(s)) { cout<<"\n 输出成功..."; break; }else{ cout<<"\n 输出失败..."; break; } case 5: if(clear_student(s)) { cout<<"\n 清空完成..."; break; }else{ cout<<"\n 清空失败..."; break; } case 0: return 0; default : cout<<"输入错误....回车继续！"; } }return 0; }
                                
                               
                              
                             
                            
                           
                          
                         
                        
                       
                      
                     
                    
                   
                  
                 
                
               
              
            
           
          
         
        
       
      
    
   

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