学生管理系统.doc

#include#include#include#defineN50#defineOLDFILEscore.dat#defineNUMFILEstd.dat#defineAVEFILEsort.dat#defineNEXTFILEnext.dattypedef struct int number;char name20;int score5;float average;stu;int readfile(char *file, stu *record);void writefile(char *file, stu *record,int stunum);void mycreate();void display(char *file);void stamenu();void numsort();void stagrade();void managemenu();void makeup_note();void leave_note();void new_list();void avesort();void main() char choose = 0;do printf(请选择你需要的服务 n); printf(1. 创建学生记录n); printf(2. 查询菜单n); printf(3. 管理菜单n); printf(4. 文盲慎入n); printf(0. 退出系统n); scanf(%c, &choose); switch(choose) case 1:mycreate();break;case 2:stamenu();break;case 3:managemenu();break;case 4:printf(ntt请自己实现创新功能！);getchar();break;case 0:exit(0);default: printf(ntt%c为非法选项！n,choose);break; while(1);int readfile(char *file, stu *record) int i = 0, j = 0; float ave = 0.0; FILE *fp = NULL;fp = fopen(file, r);if(fp = NULL) printf(Cant open the file!n); return -1;while (feof(fp) = 0) fscanf(fp,%5d%20s, &recordi.number, );for(j = 0; j = N) printf(读取文件出错, 按任意键并关闭系统!/n);getchar(); exit(0);fclose(fp);return i;void writefile(char * file, stu * record, int stunum)int i = 0, j = 0; FILE *fp = NULL;for(i = 0; i stunum; i+)fprintf(fp, %5d%20s, recordi.number, );for(j = 0; j 5; j+)fprintf(fp, %5d, recordi.scorej); fprintf(fp, 6.1Ifn, recordi.average); fclose(fp);void mycreate() int i = 0, j = 0, f = 0, number = 0; char yes_no = 0; stu recordN = 0; i = readfile(OLDFILE, record); if (i = N) printf(超出存储范围, 保存并退出输入. n); break; printf( 第%d个学生n,i+1);do f = 0;printf(n 学号:); scanf(%d, &number);for(j = 0; j = i; j+)if(recordj.number = number) printf(学号有误, 请重新输入. n);f = 1;break; while(f = 1);recordi.number = number;printf(n 姓名:); scanf(%s,);printf(n 数学成绩:); scanf(%d, &recordi.score0);printf(n 英语成绩:); scanf(%d, &recordi.score1);printf(n 物理成绩:); scanf(%d, &recordi.score2);printf(n 编程成绩:); scanf(%d, &recordi.score3);printf(n 马哲成绩:); scanf(%d, &recordi.score4);recordi.average=0;i+;getchar(); do printf(n 要继续吗 (Y/N)?n);scanf(%c, &yes_no); while(yes_no != Y & yes_no != y & yes_no != N & yes_no!=n); while(yes_no = y| yes_no = Y);writefile(OLDFILE, record, i);printf(以下是对已输入学生信息的确认!n); display(OLDFILE);getchar(); void display(char * file) stu student_infoN = 0; int stu_num = 0, i = 0, j = 0; stu_num = readfile(file, student_info); if (stu_num N) printf(读取文件出错, 按任意键并关闭系统!/n);getchar(); exit(0);for (i = 0; i stu_num; i+) printf(学号: %dn, student_infoi.number); printf(姓名: %sn, student_);printf(各门功课的分数如下: %dn);printf( 数学成绩: %d, student_infoi.score0);printf( 英语成绩: %d, student_infoi.score1);printf( 物理成绩: %d, student_infoi.score2);printf( 编程成绩: %d, student_infoi.score3);printf( 马哲成绩: %d, student_infoi.score4);printf(平均分: %d, student_infoi.average);printf(确认完按任意键返回! n);getchar(); void stamenu()char choose=0; do printf(请选择你需要的选项); printf(1. 按学号排序); printf(2. 按平均分并排序); printf(3. 统计分数段); printf(4. 返回上一层); printf(0. 退出系统); switch(choose) case 1: numsort(); break; /*按学号排序*/ case 2: avesort(); break; /*计算平均分并排序*/ case 3: stagrade(); break; /*统计分数段*/ case 4: return; case 0: exit(0); default : printf(ntt%c为非法选项！n, choose); break; while(1);/按学号排列void numsort()stu student_infoN = 0; int stu_num = 0, i = 0, j = 0; int num, min, max; stu temp; stu_num = readfile(OLDFILE, student_info); if (stu_num N) printf(读取文件出错, 按任意键并关闭系统!/n);getchar(); exit(0);max = stu_num; min = 0; for (num = max - min; num 0; num /= 2) for (i = min + num; i = 0 & student_infoj.number temp.number; j -= num) student_infoj + num.average = student_infoj.average;strcpy(student_infoj + , student_); student_infoj + num.number = student_infoj.number;strncpy(char *)student_infoj + num.score, (char *)student_infoj.score, sizeof(student_infoj.score);student_infoj + num.average = temp.average;strcpy(student_infoj + , );student_infoj + num.number = temp.number;strncpy(char *)student_infoj + num.score, (char *)temp.score, sizeof(student_infoj.score); /按平均成绩排列void avesort()stu student_infoN = 0; int stu_num = 0, i = 0, j = 0; int num, min, max; stu temp; stu_num = readfile(OLDFILE, student_info); if (stu_num N) printf(读取文件出错, 按任意键并关闭系统!/n);getchar(); exit(0);max = stu_num; min = 0; for (num = max - min; num 0; num /= 2) for (i = min + num; i = 0 & student_infoj.average temp.average; j -= num) student_infoj + num.average = student_infoj.average;strcpy(student_infoj + , student_); student_infoj + num.number = student_infoj.number;strncpy(char *)student_infoj + num.score, (char *)student_infoj.score, sizeof(student_infoj.score);student_infoj + num.average = temp.average;strcpy(student_infoj + , );student_infoj + num.number = temp.number;strncpy(char *)student_infoj + num.score, (char *)temp.score, sizeof(student_infoj.score);void stagrade() stu record N = 0; int i = 0, j, n = 0, count55 = 0;n = readfile(AVEFILE,record);for(i = 0; i n; i+) /*统计各学科各分数段人数，行表示科目，列表示分数段*/ for(j=0;j=90) countj0+; else if(recordi.scorej=80 & recordi.scorej=70 & recordi.scorej=60 & recordi.scorej70) countj3+; else countj4+;printf(全班数学成绩如下: n);for (i = 0; i 4; i+) printf(%d 分以上的有 %d 人 n, 100 - 10 * i, count0i); printf(不及格 %d 人 n, count0i); printf(全班英语成绩如下: n);for (i = 0; i 4; i+) printf(%d 分以上的有 %d 人 n, 100 - 10 * i, count1i); printf(不及格 %d 人 n, count1i); printf(全班物理成绩如下: n);for (i = 0; i 4; i+) printf(%d 分以上的有 %d 人 n, 100 - 10 * i, count2i); printf(不及格 %d 人 n, count2i); printf(全班编程成绩如下: n);for (i = 0; i 4; i+) printf(%d 分以上的有 %d 人 n, 100 - 10 * i, count3i); printf(不及格 %d 人 n, count3i); printf(全班马哲成绩如下: n);for (i = 0; i 4; i+) printf(%d 分以上的有 %d 人 n, 100 - 10 * i, count4i); printf(不及格 %d 人 n, count4i); void managemenu() char choose=0;do printf(请选择从菜单中选择你需要的选项); printf(1. 生成并打印补考通知单);printf(2. 生成并打印退学通知单);printf(3. 生成并打印新名册);printf(4. 返回上一层);scanf(%c,&choose);switch(choose) case 1: makeup_note();break; /*生成并打印补考通知单*/case 2: leave_note();break; /* 生成并打印退学通知单*/case 3: new_list();break; /*生成并打印新名册*/case 4: return;case 0: exit(0); /*返回*/default: printf(ntt%c为非法选项!n, choose); while(1);void makeup_note() stu recordN=0; int i=0,j=0,n=0,t=0,count=0,time5=0,f=0;char site5; char sl6=0;n = readfile(OLDFILE, record);for(i = 0; i 5; i+) switch(i) case 0: strcpy(sl,数学); break; case 1: strcpy(sl,英语); break; case 2: strcpy(sl,物理); break;