C/C++-数据结构-成绩管理系统-课程设计-大学生课设

#include <iostream> #include <fstream> #include <stdlib.h> #include <string> #include <cstring> using namespace std; class Student; class StuNode { public: Student* head; Student* tail; int num; }; class Student { private: int num; char name[10]; char major[10]; char clas[10]; int math_sc; int English_sc; int C_sc; public: friend class StuFun; Student* creat_stu(); Student* next; }; class StuFun:public Student { public: int Add_info(StuNode* list,Student* node); int find_mod(StuNode* list,int flag); int aver_jg_yx(StuNode* list); int All_aver_max_min(StuNode* list); int pm(StuNode* list); int deleteStu(StuNode* list); int show(StuNode* list); int Free_Node(StuNode* list); int Read_File(StuNode* list); }; StuNode* creat_node(StuNode* list) { if(list) return NULL; //list=(StuNode*)malloc(sizeof(class StuNode)); list = new StuNode; list->head=NULL; list->tail=NULL; list->num=0; return list; } Student* Student::creat_stu() { Student* node = new Student; if(!node) return NULL; cout<<"\t学号："; cin>>node->num; cout<<"\t姓名："; cin>>node->name; cout<<"\t系别："; cin>>node->major; cout<<"\t班级："; cin>>node->clas; cout<<"\t高数分数："; cin>>node->math_sc; cout<<"\t英语分数："; cin>>node->English_sc; cout<<"\tC++分数："; cin>>node->C_sc; node->next=NULL; return node; } int StuFun::Add_info(StuNode* list,Student* node) //输入1调用 { if(!list||!node) return -1; if(!list->head) { list->head = node; list->tail = node; } else { list->tail->next = node; list->tail=node; } list->num++; return 0; } int StuFun::find_mod(StuNode* list,int flag) //查询和修改学生信息 输入2,3调用 { int n,mat=0,English=0,Csc=0; char cla[10],maj[10],name[10]; Student *node=list->head,*find=NULL; if(flag==0) //查询学生信息 { cout<<"\t*************************************\n"; cout<<"\t***** 1,按系别查询！ ******\n"; cout<<"\t***** 2,按班级查询！ ******\n"; cout<<"\t***** 3,按高数成绩查询！ ******\n"; cout<<"\t***** 4,按英语成绩查询！ ******\n"; cout<<"\t***** 5,按C语言成绩查询！ ******\n"; cout<<"\t***** 6,按学生姓名查询！ ******\n"; cout<<"\t*************************************\n\n"; cout<<"请输入选项[ ]\b\b"; cin>>n; if(!list) return -1; switch(n) { case 1:cout<<"\t请输入您要查询学生的系别："; cin>>maj;break; case 2:cout<<"\t请输入您要查询学生的班级："; cin>>cla;break; case 3:cout<<"\t请输入您要查询学生的高数成绩："; cin>>mat;break; case 4:cout<<"\t请输入您要查询学生的英语成绩："; cin>>English;break; case 5:cout<<"\t请输入您要查询学生的C语言成绩："; cin>>Csc;break; case 6:cout<<"\t请输入您要查询学生的C语言成绩："; cin>>name;break; default:cout<<"\t输入错误！\n"; } cout<<"\n\t学号\t姓名\t系别\t班级\t高数\t英语\tC语言\n\n"; } if(flag==1) //修改学生信息 { cout<<"\t请输入你要修改学生姓名："; cin>>name; } while(node) { switch(n) { case 1:if(!strcmp(node->major , maj)) cout<<"\t"<<node->num<<"\t"<<node->name<<"\t"<<node->major<<"\t"<<node->clas<< "\t"<<node->math_sc<<"\t"<<node->English_sc<<"\t"<<node->C_sc<<endl; break; case 2:if(!strcmp(node->clas , cla)) cout<<"\t"<<node->num<<"\t"<<node->name<<"\t"<<node->major<<"\t"<<node->clas<< "\t"<<node->math_sc<<"\t"<<node->English_sc<<"\t"<<node->C_sc<<endl; break; case 3:if(node->math_sc == mat) cout<<"\t"<<node->num<<"\t"<<node->name<<"\t"<<node->major<<"\t"<<node->clas<< "\t"<<node->math_sc<<"\t"<<node->English_sc<<"\t"<<node->C_sc<<endl; break; case 4:if(node->English_sc == English) cout<<"\t"<<node->num<<"\t"<<node->name<<"\t"<<node->major<<"\t"<<node->clas<< "\t"<<node->math_sc<<"\t"<<node->English_sc<<"\t"<<node->C_sc<<endl; break; case 5:if(node->C_sc == Csc) cout<<"\t"<<node->num<<"\t"<<node->name<<"\t"<<node->major<<"\t"<<node->clas<< "\t"<<node->math_sc<<"\t"<<node->English_sc<<"\t"<<node->C_sc<<endl; break; case 6:if(!strcmp(node->name , name)) cout<<"\t"<<node->num<<"\t"<<node->name<<"\t"<<node->major<<"\t"<<node->clas<< "\t"<<node->math_sc<<"\t"<<node->English_sc<<"\t"<<node->C_sc<<endl; break; } if(flag==1) //修改学生信息 { if(!strcmp(node->name, name)) { cout<<"\t\t学号："; cin>>node->num; cout<<"\t\t姓名："; cin>>node->name; cout<<"\t\t系别："; cin>>node->major; cout<<"\t\t班级："; cin>>node->clas; cout<<"\t\t高数分数："; cin>>node->math_sc; cout<<"\t\t英语分数："; cin>>node->English_sc; cout<<"\t\tC++分数："; cin>>node->C_sc; break; } } find = node; node = node->next; } getchar(); return 0; } int StuFun::aver_jg_yx(StuNode* list) //对学生信息进行分析 { Student* node=list->head; char major_name[10],class_name[10]; float sum_math=0,sum_El=0,sum_C=0,aver_math,aver_El,aver_C,flag,m=0; float jg_math,jg_El,jg_C,yx_math,yx_El,yx_C,n=0.0,n1=0.0,n2=0.0,n3=0.0,n4=0.0,n5=0.0,n6=0.0;; //求单科平均分,及格率和优秀率 cout<<"\t*****************************************\n"; cout<<"\t**** 1,按系对学生信息进行分析！ ****\n"; cout<<"\t**** 2,按班对学生信息进行分析！ ****\n"; cout<<"\t*****************************************\n\n"; cout<<"\t请输入选项[ ]\b\b"; cin>>flag; if(flag == 1) //按系对学生信息进行分析！ { cout<<"\t请输入系别名称："; cin>>major_name; m = strcmp( node->major,major_name ); } if(flag == 2) //按班对学生信息进行分析！ { cout<<"\t请输入班级名称："; cin>>class_name; m = strcmp( node->clas,class_name ); } while(node) { if(!m) { sum_math += node->math_sc; sum_El += node->English_sc; sum_C += node->C_sc; if(node->math_sc >=60) //统计单科及格和优秀人数 { n1++; if(node->math_sc >=90) n4++; } if(node->English_sc >=60) { n2++; if(node->English_sc >=90) n5++; } if(node->C_sc >=60) { n3++; if(node->C_sc >=90) n6++; } n++; } node = node->next; } aver_math=sum_math/n; aver_El=sum_El/n; aver_C=sum_C