c语言课程设计 学生综合测评系统

include <stdio.h>#include <stdlib.h>#include <string.h>#define true 1struct student{char name[60];char ID[7];int score;};int dq(struct student st[]);void xianshi();void bc(struct student st[]);void add();void select();void zz();void chazhao();void xhcz();void xmcz();void del();void xmsc();void xhsc();void tj();void bjg();void xg();void xhxg();void xmxg();void bca();void fh();struct student st[300];int Number=0;void main(){int choose=0;FILE *fp=NULL;char yesorno;if((fp=fopen("C://student.dat","rb"))==NULL){printf("\n=========>提示：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){case 0: exit(0);fh();break;case 1: add();fh();break;case 2: select();fh();break;case 3: chazhao();fh();break;case 4: del();fh();break;case 5: tj();fh();break;case 6: bjg();fh();break;case 7: xg();fh();break;case 8:zz();fh();break;case 9:bca();break;default:break;}fflush(stdin);getchar();system("cls");}}void bca(){printf("\t=====程序在运行时已自动保存.....\n"); }void fh(){printf("\t===>按Enter键返回主菜单\n");}void xg(){int way=0;printf("请选择修改查找方式\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){case 1: xmxg();break;case 2: xhxg();break;default: printf("输入有误，结束!\n");break;}}void xmxg(){FILE *fp=NULL;char name[60];int i=0;int changeIndex=0;int index=0;printf("请输入要修改的学生姓名：");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[changeI ndex].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(struct student),1,fp);}fclose(fp);}void xhxg(){FILE *fp=NULL;char id[60];int i=0;int changeIndex=0;int index=0;printf("请输入要修改的学生学号：");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[changeI ndex].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(struct student),1,fp);}fclose(fp);printf("\t=======>修改成功\n");}void bjg(){int i=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);}}}void tj(){int i=0;double sum=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); }void del(){int n=0;printf("1 按姓名删除\n");printf("2 按学号删除\n");scanf("%d",&n);switch(n){case 1: xmsc();break;case 2: xhsc();break;}}void xmsc(){FILE *fp=NULL;char name[60];int i=0;int j=0;printf("请输入要删除的学生姓名：");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(struct student),1,fp); }fclose(fp);printf("删除成功;\n");}void xhsc(){FILE *fp=NULL;char id[60];int i=0;int j=0;printf("请输入要删除的学生学号：");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(struct student),1,fp); }fclose(fp);printf("删除成功;\n");}void chazhao(){int n=0;printf("1 按姓名查找\n");printf("2 按学号查找\n");scanf("%d",&n);switch(n){case 1: xmcz();break;case 2: xhcz();break;default: printf("输入有误，结束!\n");break;}}void xhcz(){char id[7];int i=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);}}}void xmcz(){char name[7];int i=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);}}}void zz(){printf("\t**********************************************************\ n\n");printf("\t^^^^^^^^^ 《学生成绩管理系统》 ^^^^^^^^^^\n\n");printf("\t^^^^^^^^^ 四川省托普信息技术职业学院 ^^^^^^^^^^\n\n");printf("\t^^^^^^^^^ 09级计算机网络技术IBM2班 ^^^^^^^^^^\n\n");printf("\t^^^^^^^^^ 周桂修改 ^^^^^^^^^^\n\n"); printf("\t**********************************************************\ n\n");}void select(){int i=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); }}void add(){int numberTemp=0;int i=0;struct student temp;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");}void bc(struct student *st){FILE *fp=NULL;fp=fopen("C://student.dat","ab+");fwrite(st,sizeof(struct student),1,fp);fclose(fp);}int dq(struct student st[]){FILE *fp=NULL;int i=0;fp=fopen("C://student.dat","rb");while(fread(&st[i],sizeof(struct student),1,fp))i++;fclose(fp);return i;}void xianshi(){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");printf("\t* [7] 修改学生信息 [8] 关于作者 *\n");printf("\t* [9] 保存数据 [0] 退出系统 *\n");printf("\t*********************************************************** ******\n");}。