学生档案标准管理系统

《C语言程序设计》课程设计任务书课题：学生成绩管理系统班级：1003专业：教育信息和技术学院成员：谭俊奇胡梦东吴峰指导老师：黄海军时间：6月14—6月28日

学生成绩管理系统一．人员分配：谭俊奇负责源程序编写，写出步骤图并评价。胡梦东查找参考资料，上机查对程序运行情况。吴峰负责对源程序查对及对整个试验评价。二.设计要求：依据键盘上数字，定义成绩管理系统分配任务该系统能够增加学生成绩统计。该系统能够查找学生成绩该系统能够统计（总成绩和平均分）该系统能够修改学生信息该系统能够查看学生成绩该系统能够删除学生成绩该系统能够输出不及格人数能够保留修改信息能够随时退出系统三．参考资料1）参考windowsapi函数大全2）参考C语言程序总汇3）参考C语言上机试验题库4）参考C语言系统操作手册四.系统结构和部分步骤图总结构structstudentst[300] xianshi()voidadd()voidchazhao()voidtj()voidxg()voiddel()voidbjg()voidzz()voidselect()voidbca()voidfh()return0五．源代码#include<stdio.h>#include<stdlib.h>#include<string.h>#definetrue1structstudent{charname[60];charID[7];intscore;};intdq(structstudentst[]);voidxianshi();voidbc(structstudentst[]);voidadd();voidselect();voidzz();voidchazhao();voidxhcz();voidxmcz();voiddel();voidxmsc();voidxhsc();voidtj();voidbjg();voidxg();voidxhxg();voidxmxg();voidbca();voidfh();structstudentst[300];intNumber=0;voidmain(){intchoose=0;FILE*fp=NULL;charyesorno;if((fp=fopen("C://student.dat","rb"))==NULL){printf("\n=========>提醒：文件不存在，是否要创建一个?(y/n)\n");scanf("%c",&yesorno);if(yesorno=='y'||yesorno=='Y'){fp=fopen("C://student.dat","wb");fclose(fp);}elseexit(0);}else{Number=dq(st);}system("cls");while(true){xianshi();printf("\t\t====>请选择：");scanf("%d",&choose);system("cls");switch(choose){case0:exit(0);fh();break;case1:add();fh();break;case2:select();fh();break;case3:chazhao();fh();break;case4:del();fh();break;case5:tj();fh();break;case6:bjg();fh();break;case7:xg();fh();break;case8:zz();fh();break;case9:bca();break;default:break;}fflush(stdin);getchar();system("cls");}}voidbca(){printf("\t=====程序在运行时已自动保留.....\n");}voidfh(){printf("\t===>按Enter键返回主菜单\n");}voidxg(){intway=0;printf("请选择修改查找方法\n");printf("1按姓名查找修改\n");printf("2按学号查找修改\n");scanf("%d",&way);switch(way){case1:xmxg();break;case2:xhxg();break;default:printf("输入有误，结束!\n");break;}}voidxmxg(){FILE*fp=NULL;charname[60];inti=0;intchangeIndex=0;intindex=0;printf("请输入要修改学生姓名：");scanf("%s",name);for(i=0;i<Number;i++){if(strcmp(name,st[i].name)){changeIndex=i;}break;}printf("\t姓名\t学号\t成绩\n");printf("\t%s\t%s\t%d\n\n",st[changeIndex].name,st[changeIndex].ID,st[changeIndex].score);printf("请重新输入该学生信息");printf("姓名：");scanf("%s",st[changeIndex].name);printf("学号：");scanf("%s",st[changeIndex].ID);printf("成绩：");scanf("%d",&st[changeIndex].score);fp=fopen("C://student.dat","wb");for(i=0;i<Number;i++){fwrite(&st[i],sizeof(structstudent),1,fp);}fclose(fp);}voidxhxg(){FILE*fp=NULL;charid[60];inti=0;intchangeIndex=0;intindex=0;printf("请输入要修改学生学号：");scanf("%s",id);for(i=0;i<Number;i++){if(strcmp(id,st[i].ID)){changeIndex=i;}break;}printf("\t姓名\t学号\t成绩\n");printf("\t%s\t%s\t%d\n\n",st[changeIndex].name,st[changeIndex].ID,st[changeIndex].score);printf("请重新输入该学生信息");printf("姓名：");scanf("%s",st[changeIndex].name);printf("学号：");scanf("%s",st[changeIndex].ID);printf("成绩：");scanf("%d",&st[changeIndex].score);fp=fopen("C://student.dat","wb");for(i=0;i<Number;i++){fwrite(&st[i],sizeof(structstudent),1,fp);}fclose(fp);printf("\t=======>修改成功\n");}voidbjg(){inti=0;printf("以下是不及格:\n");printf("\t姓名\t学号\t成绩\n");for(i=0;i<Number;i++){if(st[i].score<60){printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);}}}voidtj(){inti=0;doublesum=0.0;for(i=0;i<Number;i++){sum+=st[i].score;}printf("全班总分为：%f\n",sum);printf("平均分为：%f\n",sum/Number);}voiddel(){intn=0;printf("1按姓名删除\n");printf("2按学号删除\n");scanf("%d",&n);switch(n){case1:xmsc();break;case2:xhsc();break;}}voidxmsc(){FILE*fp=NULL;charname[60];inti=0;intj=0;printf("请输入要删除学生姓名：");scanf("%s",name);for(i=0;i<Number;i++){if(strcmp(name,st[i].name)==0){for(j=i;j<Number-1;j++){st[j]=st[j+1];}Number--;}}fp=fopen("C://student.dat","wb");for(i=0;i<Number;i++){fwrite(&st[i],sizeof(structstudent),1,fp);}fclose(fp);printf("删除成功;\n");}voidxhsc(){FILE*fp=NULL;charid[60];inti=0;intj=0;printf("请输入要删除学生学号：");scanf("%s",id);for(i=0;i<Number;i++){if(strcmp(id,st[i].ID)==0){for(j=i;j<Number-1;j++){st[j]=st[j+1];}Number--;}}fp=fopen("C://student.dat","wb");for(i=0;i<Number;i++){fwrite(&st[i],sizeof(structstudent),1,fp);}fclose(fp);printf("删除成功;\n");}voidchazhao(){intn=0;printf("1按姓名查找\n");printf("2按学号查找\n");scanf("%d",&n);switch(n){case1:xmcz();break;case2:xhcz();break;default:printf("输入有误，结束!\n");break;}}voidxhcz(){charid[7];inti=0;printf("请输入要查找学生学号:");scanf("%s",id);system("cls");printf("\t姓名\t学号\t成绩\n");for(i=0;i<Number;i++){if(strcmp(id,st[i].ID)==0){printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);}}}voidxmcz(){charname[7];inti=0;printf("请输入要查找学生姓名:");scanf("%s",name);system("cls");printf("\t姓名\t学号\t成绩\n");for(i=0;i<Number;i++){if(strcmp(name,st[i].name)==0){printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);}}}voidzz(){printf("\t**********************************************************\n\n");printf("\t^^^^^^^^^《学生成绩管理系统》^^^^^^^^^^\n\n");printf("\t^^^^^^^^^湖北师范学院^^^^^^^^^^\n\n");printf("\t^^^^^^^^^教育信息和技术学院^^^^^^^^^^\n\n");printf("\t^^^^^^^^^谭俊奇^^^^^^^^^^\n\n");printf("\t**********************************************************\n\n");}voidselect(){inti=0;printf("以下是全部学生成绩\n");printf("\t姓名\t学号\t成绩\n");for(i=0;i<Number;i++){printf("\t%s\t%s\t%d\n",st[i].name,st[i].ID,st[i].score);}}voidadd(){intnumberTemp=0;inti=0;structstudenttemp;printf("请输入要增加学生成绩个数：");scanf("%d",&numberTemp);for(i=0;i<numberTemp;i++){printf("输入第%d个同学信息\n",i+1);printf("姓名：");scanf("%s",);printf("学号：");scanf("%s",temp.ID);printf("成绩：");scanf("%d",&temp.score);st[Number++]=temp;bc(&temp);}printf("添加成功\n");}voidbc(structstudent*st){FILE*fp=NULL;fp=fopen("C://student.dat","ab+");fwrite(st,sizeof(structstudent),1,fp);fclose(fp);}intdq(structstudentst[]){FILE*fp=NULL;inti=0;fp=fopen("C://student.dat","rb");while(fread(&st[i],sizeof(structstudent),1,fp))i++;fclose(fp);returni;}voidxianshi(){printf("\t*****************************************************************\n");printf("\t**\n");printf("\t*学生成绩管理系统*\n");printf("\t**\n");printf("\t*[1]增加学生成绩[2]查看学生成绩*\n");printf("\t*[3]查找学生成绩[4]删除学生成绩*\n");printf("\t*[5]统计（总成绩和平均分）[6]输出不及格人数*\n");print