C语言写的学生成绩管理系统

1、#include<stdio.h>#include<string.h>#include<stdlib.h>structstud(longnum;charname20;floatsx;floatdx;floatts;floatdl;floatcx;floatzf;floatpj;structstudcode(structstudstudent;structstudcode*next;voidmenu();voidinput(structstudcode*);voidoutput(structstudcode*);voidbinsearch(structstud

2、code*);voidinsert(structstudcode*);voiddelet(structstudcode*);voidgood(structstudcode*);voidfail(structstudcode*);voidsort(structstudcode*);voidback();voidmain()(charchoose;intflag=1;structstudcode*head;head=NULL;printf("请先录入学生成绩彳息n");printf("输入学生学号高数、英语读写、英语听说、计算机导论和程序设计的成绩n");i

3、nput(&head);while(flag)system("cls");menu();printf("请选择:");getchar();choose=getchar();switch(choose)(case'1':output(head);back();break;case'2':binsearch(head);back();break;case'3':insert(&head);output(head);back();break;case'4':delet(&h

4、ead);output(head);back();break;case'5':good(head);back();break;case'6':fail(head);back();break;case'7':sort(head);output(head);back();break;case'0':flag=0;printf("n*TheEnd!*n");printf("n#感使用，欢迎再次登录，拜拜！#n");(选择错误，请重选)n")break;default:printf(&qu

5、ot;nWrongSelectionback();voidmenu()printf("n学生成绩统计与分析系统n");printf("n菜单nn");printf("n1.显示所有学生的信息n");printf("n2.查找某学号的学生信息n");printf("n3.插入某学生的信息n");printf("n4.删除某学号学生的信息n");printf("n5.统计各门课程成绩在90分以上学生所占百分比printf("n6.统计各门课程成绩在60分以下学

6、生所占百分比printf("n7.按总分降序排序，依高低排出名次n");printf("n0.退出nn");n");n");voidback()intx;printf("n");doprintf(-按1返回菜单界面:");scanf("%d”,&x);while(x!=1);voidinput(structstudcode*headp)structstudcode*p;while(1)p=(structstudcode*)malloc(sizeof(structstudcode);sca

7、nf("%ld”,&p->student.num);if(p->student.num=0)break;scanf("%s%f%f%f%f%f",&p->,&p->student.sx,&p->student.dx,&p->student.ts,&p->student.dl,&p->student.cx);p->student.zf=p->student.sx+p->student.dx+p->student.ts

8、+p->student.dl+p->student.cx;p->student.pj=p->student.zf/5;p->next=*headp;*headp=p;voidoutput(structstudcode*head)structstudcode*p;p=head;printf("学号tt高数t读写t听说t导论t程序t总分t平均分n");while(p!=NULL)n",p->student.num,p->,p->student.sx,p->student.dx,p->s

9、tudent.ts,p->student.dl,p->student.cx,p->student.zf,p->student.pj);p=p->next;printf("n");voidbinsearch(structstudcode*head)structstudcode*p;intk=1;longx;p=head;printf(-请输入需要查找的学生的学号：");scanf("%ld",&x);printf("n");while(p!=NULL)if(p->student.nu

10、m=x)printf("该学生信息如下：n");printf("学号tt高数t读写t听说t导论t程序t总分t平均分n");printf("%-ldt%-4st%-0.2ft%-0.2ft%-0.2ft%-0.2ft%-0.2ft%-0.2ft%-0.2fn",p->student.num,p->,p->student.sx,p->student.dx,p->student.ts,p->student.dl,p->student.cx,p->student.zf,p

11、->student.pj);k=0;break;p=p->next;if(k)printf(-没有此学生的信息n");voidinsert(structstudcode*headp)structstudcode*p;p=(structstudcode*)malloc(sizeof(structstudcode);printf("请输入你想插入的学生的信息n");scanf("%ld%s%f%f%f%f%f",&p->student.num,&p->,&p->stude

12、nt.sx,&p->student.dx,&p->student.ts,&p->student.dl,&p->student.cx);p->student.zf=p->student.sx+p->student.dx+p->student.ts+p->student.dl+p->student.cx;p->student.pj=p->student.zf/5;p->next=*headp;*headp=p;printf("*插入成功*n");voiddelet(st

13、ructstudcode*headp)structstudcode*p,*last;longx;p=*headp;printf("请输入你要删除的学生的学号：");scanf("%ld",&x);while(p->student.num!=x&&p->next!=NULL)last=p;p=p->next;if(p->student.num=x)if(p=*headp)*headp=p->next;elselast->next=p->next;free(p);printf("n*

14、删除成功*n");elseprintf("n*删除失败，无该学生信息*n");voidgood(structstudcode*head)(structstudcode*p;intx1,x2,x3,x4,x5,k;floaty1,y2,y3,y4,y5;x1=x2=x3=x4=x5=k=0;p=head;while(p!=NULL)k+;if(p->student.sx>=90)x1+;if(p->student.dx>=90)x2+;if(p->student.ts>=90)x3+;if(p->student.dl>

15、=90)x4+;if(p->student.cx>=90)x5+;p=p->next;y1=(float)x1/k;y2=(float)x2/k;y3=(float)x3/k;y4=(float)x4/k;y5=(float)x5/k;printf("高数t读写t听说t导论t程序n");printf("%-0.2ft%-0.2ft%-0.2ft%-0.2ft%-0.2fn”,y1,y2,y3,y4,y5);voidfail(structstudcode*head)structstudcode*p;intx1,x2,x3,x4,x5,k;float

16、y1,y2,y3,y4,y5;x1=x2=x3=x4=x5=k=0;p=head;while(p!=NULL)k+;if(p->student.sx<60)x1+;if(p->student.dx<60)x2+;if(p->student.ts<60)x3+;if(p->student.dl<60)x4+;if(p->student.cx<60)x5+;p=p->next;y1=(float)x1/k;y2=(float)x2/k;y3=(float)x3/k;y4=(float)x4/k;y5=(float)x5/k;printf("高数t读写t听说t导论t程序n");printf("%-0.2ft%-0.2ft%-0.2ft%-0.2ft%-0.2fn",y1,y2,y3,y4,y5);voidsort(structstudcode*head)structstudtemp;inti,j,n;structstudcode*p,*p1,*p2;n=0;p=head;wh