/*--------------------------------------------*/ /*The name of program:the system management of score*/ /*---------------------------------------------*/#include<stdlib.h>#include<stdio.h>#include<string.h>#define Max 20struct List /*节点结构声明*/{ int Number; char Name[Max]; int Chinese; int English; int Math; int Physical; int Chemsitry; struct List *next;}; typedef struct List Node; typedef Node *Link;struct student /*结构体数组声明*/{ int Number_; char Name_[Max]; int Chinese_; int English_; int Math_; int Physical_; int Chemsitry_;}student[10]={{0,"Alan",85,90,98,93,86},{1,"Danie",76,70,80,74,75},{2,"Helen",95,98,96,95,94},{3,"Bill",65,60,80,70,74},{4,"Peter",79,65,86,79,80}};int M=5; /*初始学生总数*/ /*释放链表*/void Free_List(Link Head){ Link Pointer; while(Head!=NULL) { Pointer=Head; Head=Head->next;/*消掉下一个节点*/ free(Pointer); }} /*建立链表*/Link Create_List(Link Head){ Link New; Link Pointer; int i; Head=(Link)malloc(sizeof(Node));/*内存配置*/ if(Head==NULL) printf("allocate failure!\n");/*配置失败*/ else { Head->Number=student[0].Number_; /*初始化*/ strcpy(Head->Name,student[0].Name_); Head->Chinese=student[0].Chinese_; Head->English=student[0].English_; Head->Math=student[0].Math_; Head->Physical=student[0].Physical_; Head->Chemsitry=student[0].Chemsitry_; Head->next=NULL; Pointer=Head; for(i=1;i<10;i++) { New=(Link)malloc(sizeof(Node)); New->Number=student[i].Number_; strcpy(New->Name,student[i].Name_); New->Chinese=student[i].Chinese_; New->English=student[i].English_; New->Math=student[i].Math_; New->Physical=student[i].Physical_; New->Chemsitry=student[i].Chemsitry_; New->next=NULL; Pointer->next=New; Pointer=New; } } return Head;} /*查询成绩*/Link List_Search(int Key,Link Head){ Link Pointer; Pointer=Head; while(Pointer!=NULL) { if(Pointer->Number==Key) { printf("your Number is:%d\n",Pointer->Number); printf("your Name is:%s\n",Pointer->Name); printf("your Chinese is:%d\n",Pointer->Chinese); printf("your English is:%d\n",Pointer->English); printf("your Math is:%d\n",Pointer->Math); printf("your Physical is:%d\n",Pointer->Physical); printf("your Chemsitry is:%d\n",Pointer->Chemsitry); } Pointer=Pointer->next; } return Head;} /*修改成绩*/Link List_Modify(char *s,int Key,Link Head) { Link Pointer; int newscore1,newscore2,newscore3,newscore4,newscore5; Pointer=Head; while(Pointer!=NULL) { if(Pointer->Number==Key) { if(strcmp(s,"Chinese")==0) { printf("**please input new score:"); scanf("%d",&newscore1); student[Key].Chinese_=newscore1; break; } else if(strcmp(s,"English")==0) { printf("**please input new score:"); scanf("%d",&newscore2); student[Key].English_=newscore2; break; } else if(strcmp(s,"Math")==0) { printf("**please input new score:"); scanf("%d",&newscore3); student[Key].Math_=newscore3; break; } else if(strcmp(s,"Physical")==0) { printf("**please input new score:"); scanf("%d",&newscore4); student[Key].Physical_=newscore4; break; } else if(strcmp(s,"Chemsitry")==0) { printf("**please input new score:"); scanf("%d",&newscore5); student[Key].Chemsitry_=newscore5; break; } } Pointer=Pointer->next; } return Head;} /*删除某人的成绩*/ Link Delete_List(int Key,Link Head){ Link Pointer; Link Back; Pointer=Head; while(1) { if(Pointer->next==NULL) { printf("Not Found!\n"); break; } if(Head->Number==Key) { Head=Pointer->next; free(Pointer); break; } Back=Pointer; Pointer=Pointer->next; if(Pointer->Number==Key) { Back->next=Pointer->next; free(Pointer); break; } } return Head;} /*插入某人的成绩*/Link Insert_List(int Key,Link Head,Link New){ Link Pointer; Pointer=Head; while(1) { if(Pointer==NULL) { New->next=Head; Head=New; break; } if(Pointer->Number==Key) { New->next=Pointer->next; Pointer->next=New; break; } Pointer=Pointer->next; } return Head; } /*求某人总分*/int total(int Key,Link Head){ Link Pointer; int total_; Pointer=Head; while(Pointer!=NULL) { { if(Pointer->Number==Key) total_=Pointer->Chinese+Pointer->English+Pointer->Math+Pointer->Physical+Pointer->Chemsitry; } Pointer=Pointer->next; } return total_;} /*求某人平均分*/float average(int Key,Link Head){ float average_; average_=total(Key,Head)/5; return average_;} /*求全体平均分*/float Average(int M,Link Head){ int Key; float Average_=0.0; for(Key=0;Key<M;Key++) { Average_+=total(Key,Head)/M; } return Average_;} /*某人排名*/int paiming(int Key,int M,Link Head){ int i,j,k,c; int a[10]={0}; c=total(Key,Head); for(i=0;i<M;i++) { a[i]=total(i,Head); } j=M; for(k=0;k<M;k++) { if(c>a[k]) j--; } return j;} /*主函数*/void main(){ Link Head; Link New; int selection,total_,Key1,paiming_; int Index1,Index2,Index3,Index4,Index5,Index6; float average_,Average_; char *subject; while(1) /*用户菜单*/ { printf("=========================\n"); printf("==Simple student score management system==\n"); printf("==1.Search student score==\n"); printf("==2.Modify student score==\n"); printf("==3.Delete student score==\n"); printf("==4.Insert student score==\n"); printf("==5.The total score of someone==\n"); printf("==6.The average score of someone==\n"); printf("==7.paiming ==\n"); printf("==8.The average of class==\n"); printf("==9.Quit ==\n"); printf("=========================\n"); printf("Please input your choose:"); scanf("%d",&selection); /*度取用户选项*/ Head=Create_List(Head); if(Head!=NULL) { switch(selection) { case 1: printf("**Please input the student number:"); scanf("%d",&Index1); Head=List_Search(Index1,Head);/*调用List_Search函数*/ Free_List(Head); /*调用Free_List函数*/ break; case 2: printf("**Please input the student number:"); scanf("%d",&Index2); printf("Which subject do you want to Modify:"); scanf("%s",subject); Head=List_Modify(subject,Index2,Head);/*调用List_Modify函数*/ Free_List(Head); /*调用Free_List函数*/ break; case 3: printf("While number do you want to delete:"); scanf("%d",&Index3); Head=Delete_List(Index3,Head); /*调用Delete_List函数*/ Free_List(Head); /*调用Free_List函数*/ student[Index3].Number_=-1; /*置删除学生学号不存在*/ strcpy(student[Index3].Name_," ");/*名字为空*/ student[Index3].Chinese_=0; /*分数为0*/ student[Index3].English_=0; student[Index3].Math_=0; student[Index3].Physical_=0; student[Index3].Chemsitry_=0; M--; /*删除后人数减1*/ break; case 4: New=(Link)malloc(sizeof(Node)); /*内存配置*/ printf("**Please input the student number:"); scanf("%d",&New->Number); printf("Please input student name:"); scanf("%s",New->Name); printf("Please input the score of Chinese ,English ,Math ,Physical ,Chemsitry :"); scanf("%d %d %d %d %d",&New->Chinese,&New->English,&New->Math,&New->Physical,&New->Chemsitry); printf("Please input the number for Insert:"); scanf("%d",&Key1); Head=Insert_List(Key1,Head,New); /*调用Insert_List函数*/ Free_List(Head); /*调用Free_List函数*/ student[Key1].Number_=New->Number; strcpy(student[Key1].Name_,New->Name); student[Key1].Chinese_=New->Chinese; student[Key1].English_=New->English; student[Key1].Math_=New->Math; student[Key1].Physical_=New->Physical; student[Key1].Chemsitry_=New->Chemsitry; M++; /*插入后人数加1*/ break; case 5: printf("**Please input the student number:"); scanf("%d",&Index4); total_=total(Index4,Head); /*调用total函数*/ Free_List(Head); /*调用Free_List函数*/ printf("the total of the student is:%d",total_); break; case 6: printf("**Please input the student number:"); scanf("%d",&Index5); average_=average(Index5,Head); /*调用average函数*/ Free_List(Head); /*调用Free_List函数*/ printf("the average of the student is:%f",average_); break; case 7: printf("**Please input the student number:"); scanf("%d",&Index6); paiming_=paiming(Index6,M,Head); /*调用paiming函数*/ Free_List(Head); /*调用Free_List函数*/ printf("the paiming of the student is:%d",paiming_); break; case 8: Average_=Average(M,Head); /*调用Average函数*/ Free_List(Head); /*调用Free_List函数*/ printf("the average of the whole class is:%f",Average_); break; case 9: exit(1); /*退出用户菜单*/ break; } } }}
