C\C++ 学生管理成绩管理系统V1.01（作业）

#include <stdio.h> #include <stdlib.h> #include <time.h> #include <string.h> #include <conio.h> #define HEAD_N 10 //Input_uint(FILE *fp)函数中限制输入的最大整数位数 #define Class_N 15 //最多科目门数 typedef struct Student { char name[20]; int num; float score[Class_N]; float tot; float arv; struct Student *pnext; }student;//学生信息记录结构体 typedef struct { int count,Class_M;//链表记录条数 student *pcurr;//链表当前记录指针 char subject[Class_N][20];//二维数组记录科目名称用 int flag; //是否正常退出标志 }mess;//运行参数设置用的结构体 mess info;//定义链表信息全局变量 int Input_uint(FILE *fp); //无符号整形输入函数 int Input_uint(FILE *fp,int digit );//无符号整形输入重载函数 void filebegin(FILE **fphead, double *start, char *argv[]);//程序开头建立同名文件并计时开始函数 void fileend(FILE **fphead,double *start,double *finish);//程序结束释放文件并计时结束函数 student *creat(FILE *fp);//建立链表函数 student *appen(FILE *fp,student *phead);//追加记录函数 student *delet(FILE *fp,student *phead, int index);//删除一条记录函数 student *insert(FILE *fp,student *phead);//在当前记录后插入一个记录函数 void find(FILE *fp,student *phead);//查找函数 void print(FILE *fp,student *phead);//屏幕显示函数 void file(FILE *fp,student *phead );//显示结果存储到文件函数 void sort(FILE *fp,student *phead );//排序记录函数 int main(int argc, char *argv[]) { double start, finish; FILE *fp, *fpini,*fpdb;//*fp 日志文件，*fpini 信息文件，*fpdb 数据文件 int choice=5,par;// choice 菜单选择项 student *phead,*tempstudent, *tempptail; filebegin(&fp, &start, argv); //filebegin(&fp, &start, &argv[0]);也一样 info.flag = 1; if ( (fpini=fopen("student.ini", "rb+"))==NULL) { if ( (fpini=fopen("student.ini", "wb+"))==NULL) { printf("无法创建或打开\"student.ini\"文件\n"); exit(0); } else { info.count = 0; info.pcurr = NULL; printf("请输入科目的门数(最多不能超过%d门)：",Class_N); info.Class_M =0; while(!(info.Class_M >=1 && info.Class_M <= Class_N)) { info.Class_M = Input_uint(fp,2); } printf("请输入 %d 门科目名称：\n",info.Class_M); for(int temp = 0 ;temp < info.Class_M ; temp++) { printf("请输入第 %d 门科目名称：",temp+1); scanf("%8s",info.subject[temp]); } } } else { fread(&info,sizeof(mess),1,fpini); int temp = info.flag; info.flag=0; rewind(fpini); fwrite(&info,sizeof(mess),1,fpini); fclose(fpini); fpini=fopen("student.ini", "rb+"); info.flag = temp; if (info.subject[0][0]==NULL) { printf("\"student.ini\"文件错误，请删除该文件，按任意键尝试自动删除！\n"); getchar(); fclose(fpini); remove("student.ini"); if ( (fpdb=fopen("student.db", "rb+"))==NULL); else { fclose(fpdb); remove("student.db"); } exit(0); } } if ( (fpdb=fopen("student.db", "rb+"))==NULL) { if ( (fpdb=fopen("student.db", "wb+"))==NULL) { printf("无法创建或打开\"student.db\"文件\n"); exit(0); } else { phead = creat(fp);//建立链表 getchar(); } } else { tempptail = phead = (student*)malloc(sizeof(student)); fread(phead,sizeof(student),1,fpdb); for(int temp = 1 ;temp < info.count ; temp++) { tempstudent= (student*)malloc(sizeof(student)); tempptail->pnext = tempstudent; fread(tempstudent,sizeof(student),1,fpdb); tempptail = tempstudent; } } info.pcurr = phead; if (0==info.flag) { printf("上一次程序非正常退出，请检查数据是否正确?\n"); printf("当前库文件共有记录 %d 条\n",info.count); printf("当前库文件中记录的科目有："); for(int temp = 0 ;temp < info.Class_M ; temp++) { printf("%8s",info.subject[temp]); } printf("\n按任意键继续！\n"); getchar(); } while(1) { if(7==choice) break; system("cls"); printf("\n *******学生成绩管理系统****** "); printf("\n ** 1.追加记录 ** "); printf("\n ** 2.删除记录 ** "); printf("\n ** 3.插入记录 ** "); printf("\n ** 4.查找记录 ** "); printf("\n ** 5.显示记录 ** "); printf("\n ** 6.排序记录 ** "); printf("\n ** 7.退出系统 ** "); printf("\n ***************************** "); if(choice>6 ||choice==0) printf("\n *** 选择错误，请重新选择!***\n"); else printf("\n *******请您选择******\n"); choice=Input_uint(fp,1); switch(choice) { case 1 :phead = appen(fp,phead); system("pause"); break; case 2 :printf("删除第几个学生\n"); fprintf(fp,"删除第几个学生\n"); par=Input_uint(fp,1); phead = delet(fp,phead,par); system("pause"); break; case 3 :phead = insert(fp,phead); system("pause"); break; case 4 :find(fp,phead); system("pause"); break; case 5 :print(fp,phead); file(fp,phead); system("pause"); break; case 6 :sort(fp,phead);break; case 7 :break; default:break; } } fileend(&fp, &start, &finish); info.flag=1; rewind(fpini); fwrite(&info,sizeof(mess),1,fpini); fclose(fpini); if (phead != NULL)//判断是不是为空记录 { rewind(fpdb); for(int temp = 0 ;temp < info.count ; temp++) { fwrite(phead,sizeof(student),1,fpdb); phead = phead->pnext; } fclose(fpdb); } else { fclose(fpdb); remove("student.db"); } return 0; } int Input_uint(FILE *fp) { int count_a=0,ratio=1,count_c=0,number=0,judge=1; //count_a计数变量；ratio转换系数，1，10，100等； // count_c计数变量；number函数返回值； // judge输入判断变量，-1出错; char str[HEAD_N]; for (count_a=0;count_a<HEAD_N;count_a++) str[count_a]='0'; do { if (judge==1) ; else { printf("\n输入错误。请输入一个大于等于零的整数:"); fprintf(fp,"\n输入错误。请输入一个大于等于零的整数:"); } judge=1; for(count_a=HEAD_N-1,count_c=HEAD_N-1;count_a>=0;count_a--,count_c--) { str[count_a]=getchar(); if(!((str[count_a]>='0' && str[count_a]<='9') || (str[count_a]==10))) judge=-1; if(str[count_a]==10 || count_a==0) { if(str[count_a]==10) break; if(str[count_a]!=10 && count_a==0) { for(;;) { count_a=getchar(); if(!((count_a>='0'&& count_a<='9') || (count_a==10))) judge=-1; if (count_a==10) break; } } count_a=0; } } if (judge>0) { for(count_a=count_c+1;count_a<HEAD_N;count_a++) { if (str[count_a]>='0' && str[count_a]<='9') { number+=(str[count_a]-'0')*ratio; ratio*=10; } else break; } } }while(judge<0); return number; } int Input_uint(FILE *fp,int digit ) { int count_a=0,ratio=1,count_c=0,number=0,judge=1; //count_a计数变量；ratio转换系数，1，10，100等； // count_c计数变量；number函数返回值； // judge输入判断变量，-1出错; char str[HEAD_N]; if (digit>HEAD_N) digit=HEAD_N; for (count_a=0;count_a<digit;count_a++)